Postal Mdd Scanner Tips and Tricks for the New and Frightened City Carrier Assistant and Rural Carrier Associate

Updated on October 22, 2019
Mel Carriere profile image

Mel Carriere does not have a Masters from Vanderbilt, he does not have three rambunctious labs, he is just an oddly erudite mailman.

Mel Carriere turns his laser focus to the MDD Scanner, to shed some light on its lesser known features.
Mel Carriere turns his laser focus to the MDD Scanner, to shed some light on its lesser known features. | Source

Confusing New Gadget From Out Of The Blue

After the third day of training, when they roll back that stone and the newbie City Carrier Assistant (CCA) or Rural Carrier Associate (RCA) is expected to rise from the tomb of his or her pre-Postal life and function independently as a fully fledged letter carrier, these newborns can feel a little groggy. Three days of training is not enough time to learn to walk and chew gum at the same time, which is essentially what the act of delivering mail is. Accordingly, coordinating their motions into a smooth, efficient delivery flow while trying to keep track of all the other job functions, this while navigating around a confusing grid of unknown neighborhoods, can be overwhelming to the newly hatched.

To compound this already full plate of CCA and RCA worries and woes, a menacing blue box—the Mobile Delivery Device (MDD)—is also thrust their way, with expectations that they will know exactly what to do with it.

Not only does the gizmo possess a bewildering interface, it also appears to be possessed! The first time the gadget squawks at a new hire, there in the supposed solitude of the driver's compartment, it is enough to make him or her mow through a row of mailboxes. Yes, like one of those devil dolls in a creepy horror film (or GEICO commercial), the inanimate has come to life; the presumably insentient thing speaks!

At this point the trembling, freshly stamped CCA or RCA is ready to throw down the satchel and run home in terror. But do not lose heart, my freshly minted readers! In time you will get used to these intrusions upon your seclusion—the little voice might even lessen the loneliness and isolation you feel with that heavy weight of mail upon your shoulders, and no one there to help ease your burden.

In order to smooth over the daily transactions you will be conducting with your new little blue friend, this article will provide some pointers on a few important but less obvious functions of the MDD scanner. I am assuming here that after day three you at least know how to scan a package, so we will skip that part. But there are other essential, or sometimes merely useful scanner operations, that can help you sink or swim in your new letter carrier job. Keep in mind that if you sink, the MDD scanner does have GPS, so at least the Coast guard will be able to locate your body out at sea.

The four topics covered here will help you stay off several of Postal Santa's lists, all of them naughty, none of them nice. They are:

  1. Using the scanner to keep track of your MSP scans.
  2. Scanning Prepaid Acceptance items.
  3. Accessing the MDD's Package Look Ahead Feature.
  4. Properly responding to a sampling request.

The scanner menu for all functions listed here is accessed by pressing the ESC key in the upper left-hand corner.
The scanner menu for all functions listed here is accessed by pressing the ESC key in the upper left-hand corner. | Source

What's On The Menu?

Your point of departure for all scanning adventures is the MDD Menu, accessed by pressing the escape key - ESC, in the upper left hand corner of the device. All of the scanner functions discussed in this article can be carried out by using the items on this menu. There are additional obscure, rarely-used tasks entered through this list that are beyond the scope of the present discussion. Since your head is spinning already I'm trying to keep it as simple as possible, so that your skull doesn't come unscrewed from your backbone and splatter on the sidewalk.

A glance at the MDD menu, accessed by hitting ESC in the upper left hand corner of the device.
A glance at the MDD menu, accessed by hitting ESC in the upper left hand corner of the device. | Source

Sticker Shock - Tracking Your MSP Scans

Now that Postal Management can literally track your "bread crumbs" using the GPS inside the MDD scanner, meaning they can monitor where you are at all times, it is a marvel they keep the archaic MSP system alive. Although I can understand the continued purpose of the DEPART TO ROUTE and RETURN TO OFFICE scans, the street MSP bar codes seem pointless. The only thing I can think of is that some cubicle-jockey's job depends upon the continued proliferation of these messy, faded labels, about as functional as those Chiquita stickers you peel off a banana and stick on your forehead to walk around the supermarket with, except not as much fun.

If you are an RCA you scan skim over this part. I may be wrong, but I have been told that the only MSP scans rural carriers make are DEPART TO ROUTE and RETURN TO OFFICE. Easy enough to count to two.

I wish I could remember what the MSP acronym even stands for, but because the program is about 20 years old now its meaning has mostly faded from everybody's memory. Nonetheless, because the brittle fossil is still on display in the museum, meaning you are going to be held accountable for making these scans. Because the process lingers painfully, I'll teach you a little trick for keeping track of how many MSPs you have made while delivering along your way.

A typical postal city route has three office MSP scans, HOT CASE, DEPART TO ROUTE, RETURN TO OFFICE, and usually between 9-12 MSP street scans. Ask your trainer or some less-cantankerous-than-usual old-timer where the office bar codes are, to make sure. HOT CASE will probably be inside your route's letter case, where you make your final pull before hitting the street, and the other two are typically somewhere by the time clock. Sometimes there will be a DEPART TO ROUTE sticker inside your postal vehicle, but don't depend on it.

Certain hard-bitten veterans will try to troll you by claiming there are also DEPART TO RESTROOM and RETURN FROM RESTROOM scans, but although Postal Management has certainly bounced this idea around, it has never been implemented. DO NOT fall for this trick. It is as tired as the old go get me the case stretcher gag.

Before you depart for the street, ask your manager, supervisor, or 204B to give you a DOIS list of your MSP scans. If they don't know what that is or how to do it, they might as well give you the clipboard and go home. Next, add up the number of scans on this list. Then, as you are delivering and making MSP scans, keep track of them on the MDD scanner, as follows:

1. Press escape - ESC

2. Select item D (Database Info)

3. View the number next to MMD. These are the total MSP scans you have made, including the route you are assigned to that day and any other routes you might be carrying bits and pieces of.

4. If the MMD number does not add up to the DOIS MSP list, either go back and scan the one(s) you missed, consult your supervisor, or forget it and hope your boss will be too busy the next day to beat you up for it. Sometimes you just need to live to fight another day, and not sweat these details.

The number of MSP scans you have made is listed third from the top, next to MMD.
The number of MSP scans you have made is listed third from the top, next to MMD. | Source

MDD Pickup Line - Prepaid Acceptance

Unlike the dusty, moldy MSP scans you will be needlessly burdened with every day, another MDD Scanner feature that is useful in the modern, real-time scanning environment is Prepaid Acceptance. Prepaid Acceptance is used to scan packages that customers hand you on the street for mailing, to enter them into our system so that recipients waiting downstream can be assured their items are on the way. It is a dangerous reef we swim upon, and uncountable postal competitors abound in the coral, waiting to pounce upon us like sharks. Therefore, accurate scanning is essential to swim among the postal predators, and Prepaid Acceptance is your speargun.

There are a few things you should be aware of before scanning Prepaid Acceptance, however. First of all, the item being handed to you by that hurried customer, slamming on the brakes on the way to the Post Office as they conveniently run into you, must have a printed label on it, with a bar code. Secondly, that bar code must be a POSTAL barcode. Never accept packages from our competitors, unless those competitors provide a postal shipping label for items that are being returned, something that is common. Finally, do not accept stamped packages weighing over 16 ounces. These must be submitted to a clerk in a Post Office.

Once you have decided to accept the package(s), the rest is easy.

1. Press escape - ESC, to access the menu.

2. Select item H - Prepaid Acceptance.

3. Scan the item(s). No other steps are necessary.

Time Travelling - Package Look Ahead

In addition to being a scanning device and an electronic tattle-tell that constantly snitches your location back to management, the MDD Scanner is also a time machine. Although it won't yet allow you to travel into the past to fix your eff-ups, the MDD can let you peer into the future, to see what is going to happen around the next corner. In this way it is like a crystal ball, except you don't have to dish out your scarce, hard earned dollars to some sketchy palm-reading Madam in a ghetto storefront.

The time machine I am referring to in my roundabout way is the Package Look Ahead feature. As clerks sort incoming packages through the PASS machine (that big one-armed bandit in the parcel-throwing area), these are absorbed through magical voodoo vapors into the memory of your little MDD. As a result, when you head out to the street, your scanner already knows most of the packages you will be delivering that day, and will allow you to access the list without demanding an eye of newt or a drop of virgin's blood, like the palm-reader did.

We old-timers have a built in Package Look Ahead inside our thick skulls, a legacy of times when we didn't have any electronic cheating devices and had to rely on our now quickly fading memories. Quite frankly, prior to writing this I didn't use the Package Look Ahead feature at all, I just lined up the packages in order inside my the LLV's rear compartment. However, because some of my older coworkers found it useful, particularly those in the advanced stages of Sometimers Syndrome, I decided to try it.

For you, the new CCA or RCA still struggling to integrate these processes being thrown at you from all directions, Package Look Ahead can help you avoid the deadly, dreaded, time wasting practice of the BACKTRACK. It is not an exaggeration to say that in racing toward that dreaded postal witching hour, the arbitrary drop-dead time after which you will turn into a postal pumpkin, every click counts. Backtracks are click killers, they munch away time that you will never retrieve, because the MDD time machine is currently engineered to go forward, not backward, as I said. Bad things also seem to happen on backtracks, such as accidents, because you will be probably be driving fast, doing U-turns, double parking, and whatever else you need to do in your futile quest to regain this lost time.

In your battle against the backtrack, use this Package Look Ahead feature. For research purposes, I began to investigate it in the past few days, and find it helpful, because it shows all packages the clerks have sent through the PASS machine that delivery day.

As you scan these assigned packages, they will disappear from Package Look Ahead. Any unscanned packages for segments of your route you have already delivered will be highlighted in yellow, indicating you missed one somewhere.

Therefore, in your battle against the backtrack, I recommend that you use the Package Look Ahead feature after every relay, to avoid having to retrace your steps when you are already on the other side of the route and you find a missing in action parcel, hiding in a dusty corner of your vehicle. Better a small backtrack now while you are still on the block, rather than having to cross several busy streets later, in rush hour traffic, to deliver that skulker.

The Package look ahead screen, showing all parcels big and small that have not yet been delivered.  The yellow highlighted bar is for a package still hanging on a segment of the route already delivered.
The Package look ahead screen, showing all parcels big and small that have not yet been delivered. The yellow highlighted bar is for a package still hanging on a segment of the route already delivered. | Source

It's Alive! The Sampling Request

The first time I heard my MDD Scanner speak to me I thought the Rapture had finally come and Jesus was calling the faithful home. Then I realized there were no trumpets blowing, and that Jesus's voice was somewhat nasal and robotic, like that anti-smoking poster boy speaking through his feeding tube. This was not at all what I had expected from Jesus. I gave up thinking about joining my grandmother in glory that day, and focused my attention on the direction of the sound, which emanated from the little MDD chatterbox, hanging in its holder on my LLV dashboard.

During your all too brief on the job training period, you might not be lucky enough to be exposed to one of these divine visitations, so you need to know what to do. You might be tempted to shrug it off, skip it and move on, like you did with that last text from your wife that said It's Nine PM, are you really still delivering mail right now (¬_¬)?

But please do not do this. If you do, if you leave the sample to ferment there in the sticky innards of your MDD, your Postmaster will threaten you with dire consequences, ranging from a public caning to taking away your birthday (although you will probably be working your birthday anyway, BTW). Perhaps these are idle threats - I have yet to encounter anyone who was busted for ignoring a sample request, but why tempt fate? If you laugh off the danger the Postal gods will certainly punish you for your hubris, silly rookie.

Yet sometimes you just cannot answer the call right away. Sometimes, like Jonah, who deferred denouncing the Ninevites until a more convenient moment, you need to get away a little while, so you defer sampling activity until a more convenient moment. The MDD Scanner is mostly to blame, being a fickle bitch who likes to assert her authority at inopportune times. For instance, you might be in the process of driving, or delivering a package. You might be on the next block over from where the sampling address is. Just yesterday I had a sample go off across the street and half a block away from a house I had already delivered, an hour earlier. But what happened while I was actually delivering over there? Nothing. Dead silence.

Fortunately, if the sampling request catches you in an awkward moment, you can put it off until later, simply by hitting the ESC key in the upper left corner of the scanner. There it will be stored in the 'Work Orders' section of the Scanner Memory, which can be accessed by pressing ESC, then W. But don't leave it sitting there all day, simmering in its juices. You cannot postpone the inevitable forever, sooner or later it has to be dealt with, or you will be guilty of the unforgivable scanning sin of an IGNORE. Your MDD Scanner is also an attention whore, she will not be ignored with impunity.

As a best practice, at the end of the day hit ESC-W to see if there are any nagging, narcissistic samples lingering in your scanner, begging to be looked at. If there are, remove them before they get infected.

In the event that you are on a perfect Postal Planet where everything happens in exact sequence, meaning you are ready to deal with the sample right now, here is what you do:

This is the screen that pops up when the scanning request first comes to you from out of the blue.
This is the screen that pops up when the scanning request first comes to you from out of the blue. | Source

Sampling Request Steps:

1. You hear the voice - Sampling Request at (Insert Address here). Please scan flats then letters (Spoiler - nobody dies if you scan letters first)

2. Hit enter (ENT - green button upper right)

3. You will be prompted whether the sampling address is for your route. Select YES. Why the NO option even exists I don't know, but selecting it is called a DENIED, and it is as great a sin as an IGNORED. You aren't even given the leeway to deny three times before the cock crows. It's one and done. Once you deny, the sample does not go back into the Work Order hot box to fume and fret, it is completely obliterated. No do-overs.

4. After selecting YES, the scanning screen comes up, prompting you to scan 15 mail pieces (There are hardly ever 15).

5. Aim scanner at intelligent mail bar code (see photo below). A successful scan is answered with a beep.

6. Press ENT again when finished. Select the option that reads Nothing Further to Scan.

For those scans you left to chill on ice while you went about your business, here is how to thaw them out. Press ESC-W to retrieve all work orders, then select the appropriate one. Now scan the mail pieces via the procedure outlined above.

The MDD GPS being imprecise at best, you will very often receive a sampling request after delivering the mail for the indicated address. DO NOT GO BACK to sample the mail for it. Your primary mission as a CCA is to keep your nimble, fleet feet moving forward, not backwards. You are not held accountable for the inexact navigational skills of this blue beast, which had it been Columbus would have sailed you right off the edge of the planet. So instead of moving in a retrograde fashion, acknowledge the request up to the point of the sampling screen, but instead of scanning bar codes hit ENT immediately, then select ALREADY PASSED ADDRESS.

This screen appears when you are ready to start scanning.
This screen appears when you are ready to start scanning. | Source
The Intelligent Mail barcode that you will be scanning.
The Intelligent Mail barcode that you will be scanning. | Source
Already Passed Address (Option 3) is for those late blooming requests that pop up after you have made delivery. DO NOT go back to sample these. Hit option 3 and move on.
Already Passed Address (Option 3) is for those late blooming requests that pop up after you have made delivery. DO NOT go back to sample these. Hit option 3 and move on. | Source

Conclusion - Will You Soar, or Sink?

Good news to your loving spouse, your scanner has now replaced him or her as your ball and chain. The MDD scanner will be welded to your body for whatever is left of your postal career. There, joined at the hip, it can either weigh you down or lift you up. Learn to understand and utilize all of its hidden features, so you can soar with the Postal Eagle up there in the cloud, or ignore its intrusive presence and sink to the bottom of the deep Postal blue, where you will be consumed by the scanning sharks. The choice is up to you.

This article does not pretend to be all inclusive. Please contribute to the understanding of your fellow letter carriers by sharing your tips and tricks in the comments section below.

Questions & Answers


    0 of 8192 characters used
    Post Comment
    • Mel Carriere profile imageAUTHOR

      Mel Carriere 

      13 days ago from San Diego California

      Thank you for dropping in, Mills. I apologize for my late reply, I was vacationing for a while. The postal service was still stuck in pen and ink until very few years ago. We are the last to implement any new technology, and often do so shoddily. I actually think the newbies catch on to the technology better than the oldtimers, however, who are loathe to try anything new. Great hearing from you.

    • Mel Carriere profile imageAUTHOR

      Mel Carriere 

      13 days ago from San Diego California

      Thank you James. I am pleased that you have visited the Postal Tsunami site. There is a CCA page there that has links to all my hub pages articles. If you have not used the MDD scanner, a lot of this will just go over your head. But I appreciate you trying to tackle a difficult subject.

    • Mel Carriere profile imageAUTHOR

      Mel Carriere 

      13 days ago from San Diego California

      Thank you DreamerMeg. I guess electronic signatures are the norm now. It beats the low tech days when postal clerks had to deal with filing hundreds of those paper signatures every day. I appreciate your kind words.

    • Mel Carriere profile imageAUTHOR

      Mel Carriere 

      13 days ago from San Diego California

      Thank you Devika. I really appreciate your visit!

    • Mel Carriere profile imageAUTHOR

      Mel Carriere 

      13 days ago from San Diego California

      Sorry Eric I was out of town for a few days and have neglected my august readership here. Any presents you give your letter carrier are well received, as long as you're not doing it just to clean out your refrigerator.

    • profile image

      Pat Mills 

      2 weeks ago from East Chicago, Indiana

      I hope the new carriers have someone like you to explain the MDD. It sounds as if the experienced carriers more easily adapt to electronic gadgets than those who have had them readily available all of their lives. When I started my dubious career, we had just pen and paper to document the things that needed to be documented. I enjoy the convenience of saving paper and ink. I hope the younger carriers are just experiencing growing pains, and not permanent impediments to their work.

    • justthemessenger profile image

      James C Moore 

      2 weeks ago from The Great Midwest


      I read this, but didn't necessarily understand it all. So, I will re-read. The first words that comes to mind are ,"user manual." Have you considered distributing this to co-workers , presenting this to management or even your Postal Sunami site?

    • DreamerMeg profile image


      2 weeks ago from Northern Ireland

      Our local carriers have these and sometimes you have to use your finger to sign on the screen. How they expect a 'real' signature I do not know! 'They' being the designer and authorities, not the courier, who is always polite and friendly. Interesting terms, 'depart to route' is not exactly newbie friendly. Good job you and your colleagues can help the rookies.

    • DDE profile image

      Devika Primić 

      2 weeks ago from Dubrovnik, Croatia

      Hi Mel you enlightened me on what you do and in detail and that you have improvement. Have a great day!

    • Ericdierker profile image

      Eric Dierker 

      2 weeks ago from Spring Valley, CA. U.S.A.

      Hey Mel, I was just wondering. Mom used to give our carriere Joe a present and a Christmas pie. I just give local fruit. Do folks still do that on the norm. Seemed LIke Joe was an institution. I wrote off some letters Monday do folks still do that?

      Oh well I will try to get back to having a life. But....

    • Mel Carriere profile imageAUTHOR

      Mel Carriere 

      2 weeks ago from San Diego California

      Bill I know this is written for a specific audience, but I am always grateful for your continued support. Have a great day up there in the big dark.

    • Mel Carriere profile imageAUTHOR

      Mel Carriere 

      2 weeks ago from San Diego California

      Eric you are being modest. I am sure she is enthralled by your glib wit and charm that exudes from every pore of your being. You can memorize this article and really wow her with postal technical talk. Thanks for dropping in!

    • Mel Carriere profile imageAUTHOR

      Mel Carriere 

      2 weeks ago from San Diego California

      Thank you Pamela. I know this is something you will never use but I am grateful for your visit all the same.

    • billybuc profile image

      Bill Holland 

      2 weeks ago from Olympia, WA

      Sheez, Mel, way too complicated for me, but I am going to go out today and thank Burt when he drops off our mail.

    • Ericdierker profile image

      Eric Dierker 

      3 weeks ago from Spring Valley, CA. U.S.A.

      I don't no about these complexities I just love my carriere. We swoon over each other daily. Perhaps I need a job. Maybe she is just being polite. I have not a clue exsceipt she is part of our family, Go figure.

    • Pamela99 profile image

      Pamela Oglesby 

      3 weeks ago from Sunny Florida

      I never knew about the complexities of your job. This well-written, rather technical article written with a bit of humor and tad of sarcasm was interesting to read. I appreciate the difficulties of your job a little better now.


    This website uses cookies

    As a user in the EEA, your approval is needed on a few things. To provide a better website experience, uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

    For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at:

    Show Details
    HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
    LoginThis is necessary to sign in to the HubPages Service.
    Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
    AkismetThis is used to detect comment spam. (Privacy Policy)
    HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
    HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
    Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
    CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
    Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the or domains, for performance and efficiency reasons. (Privacy Policy)
    Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
    Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
    Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
    Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
    Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
    VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
    PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
    Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
    MavenThis supports the Maven widget and search functionality. (Privacy Policy)
    Google AdSenseThis is an ad network. (Privacy Policy)
    Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
    Index ExchangeThis is an ad network. (Privacy Policy)
    SovrnThis is an ad network. (Privacy Policy)
    Facebook AdsThis is an ad network. (Privacy Policy)
    Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
    AppNexusThis is an ad network. (Privacy Policy)
    OpenxThis is an ad network. (Privacy Policy)
    Rubicon ProjectThis is an ad network. (Privacy Policy)
    TripleLiftThis is an ad network. (Privacy Policy)
    Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
    Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
    Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
    Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
    ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
    Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)
    ClickscoThis is a data management platform studying reader behavior (Privacy Policy)