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USPS Implementation Guide

Introduction

Supports all Endicia services including First Class, Priority, Express and Media Mail. Ship domestic and international, and benefit from CPP rates.

Preferences

You need to set up an Endicia account to be able to create USPS labels, or if you already have an Endicia account through our app then all you need is your Username and Pass Phrase.

Add Existing Account

Make sure you switch the toggle as you see highlighted below, you can then add your existing account details.

Please be aware that this only works if you are already using Endicia or have already set up an account via the two below methods.

Create a new Endicia Account via link

Utilize this link to create a new account with Endicia, which automatically ensures that the Endicia account that you set up will work via our app.

Once you have filled in all the details on the Endica website, you will be sent a username. Please contact Endicia support for them to activate this account.

Once you have followed these two above steps you can safely add your new account using the Existing Account toggle.

Create a new Endicia Account via the app

Fill in the Endicia Account requirements as you can see here:

When filling in the Credit Card details make sure that your Billing Address matches what your bank has on file.

Service Types

Service Types Value Description
First First This service is an affordable and easy way to send envelopes and lightweight packages, with delivery in 1-3 business days.
Priority Priority This service includes tracking and delivery in 1-3 business days.
Priority Express PriorityExpress This overnight service has competitive prices and fast delivery every day, all year, with limited exceptions, to most U.S. addresses and PO Boxes.
Library Mail LibraryMail An economical shipping solution for qualified items to be mailed between academic institutions, public libraries, museums and other qualified organizations.
Media Mail MediaMail A ground shipping solution for media items like books, sound recordings, recorded video tapes, printed music, and recorded computer-readable media (such as CDs and DVDs)
Standard Post StandardPost USPS® standard and express mail services allow you to choose delivery options that fit your needs.
Parcel Select ParcelSelect An economical ground delivery service designed for large and medium sized shippers.
Critical Mail CriticalMail Critical Mail is tailored for customers requiring cost-effective mailing solutions for important documents in many types of businesses.
First Class Package International Service FirstClassPackageInternationalService An economical way to send lightweight packages to more than 190 countries. Packages can weigh up to 4 lbs but must not be more than $400 in value.
First Class Mail International FirstClassMailInternational This service is the most affordable way to send letters and lightweight packages to more than 190 countries.
Priority Mail International PriorityMailInternational This service is a reliable and affordable way to ship to more than 190 countries. Use free Flat Rate Boxes and Envelopes to pay one price, regardless of box weight, up to 70 lbs.
Express Mail International ExpressMailInternational This service is a reliable, high-speed mail service available to more than 190 countries and an average delivery of 3 to 5 business days.
Priority Mail Express International PriorityMailExpressInternational This service is a reliable, high-speed mail service available to more than 190 countries and an average delivery of 3 to 5 business days.
Global Express Guaranteed GXG With this service shipments are delivered in 1–3 business days to more than 190 countries, with overnight delivery to many places in Canada.

Packaging Types

Packaging Types Value
Card Card
Letter Letter
Flat Flat
Parcel Parcel
Large Parcel LargeParcel
Irregular Parcel IrregularParcel
Flat Rate Envelope FlatRateEnvelope
Flat Rate Legal Envelope FlatRateLegalEnvelope
Flat Rate Padded Envelope FlatRatePaddedEnvelope
Flat Rate Gift Card Envelope FlatRateGiftCardEnvelope
Flat Rate Window Envelope FlatRateWindowEnvelope
Flat Rate Cardboard Envelope FlatRateCardboardEnvelope
Small Flat Rate Envelope SmallFlatRateEnvelope
Small Flat Rate Box SmallFlatRateBox
Medium Flat Rate Box MediumFlatRateBox
Large Flat Rate Box LargeFlatRateBox
DVD Flat Rate Box DVDFlatRateBox
Large Video Flat Rate Box LargeVideoFlatRateBox
Regional Rate Box A RegionalRateBoxA
Regional Rate Box B RegionalRateBoxB
Regional Rate Box C RegionalRateBoxC
Large Flat Rate Board Game Box LargeFlatRateBoardGameBox

Special Services

These are special services offered by the carrier which can be selected either during the Shipment creation, or can be defaulted in the Custom Address Source. In this section you can find the most commonly used services.

Certified Mail

This service provides the sender with a mailing receipt and electronic verification that an article was delivered or that a delivery attempt was made. This service is available with the following package and service types:

  • Letter - First
  • Parcel - First
  • Parcel - Priority
  • Flat - First
  • Flat - Priority

Certified Mail is a checkbox field, which requires TRUE value.

Signature Confirmation

When selecting this service you'll be provided the signature and name of the recipient, the date, time and location of the delivery.

Adult Signature Required/Restricted Delivery

The Adult Signature Required service ensures that the recipient of the mail items is at least 21 years of age or above. The recipient or a resident of the recipient’s address is required to show a form of photo identification to the delivery employee for age confirmation.
The Adult Signature Restricted Delivery service requires the signature of the addressee only, who must be 21 years of age or older.

Electronic Return Receipt

The Electronic Return Receipt provides the mailer with evidence of delivery (to whom the mail was delivered and date of delivery), along with information about the recipient's actual delivery address.

International Shipping

In this section you'll find the required or recommended fields and settings for international shipments.

Mandatory fields for Customs items

  • Description
  • Quantity
  • Weight
  • Unit price
  • Country

If you plan to automate the shipment creation, then for international shipments the Contents Type and Non Delivery options need to be defaulted in the Custom Address Source.
The values for Non Delivery are Abandon or Return.

Label Formats

Available label formats

PDF
  • 4x6
  • 3.5x5.25
  • 4x4
  • 4x5
  • 4x4.5
  • DocTab
  • 6x4
  • 4x8
  • 7x3
  • 6x4
  • Mailer7x5
  • EnvelopeSize10
PNG
  • 4x6
  • 3.5x5.25
  • 4x4
  • 4x5
  • 4x4.5
  • DocTab
  • 6x4
  • 4x8
  • 7x3
  • 6x4
  • Mailer7x5
  • EnvelopeSize10
GIF
  • 4x6
  • 3.5x5.25
  • 4x4
  • 4x5
  • 4x4.5
  • DocTab
  • 6x4
  • 4x8
  • 7x3
  • 6x4
  • Mailer7x5
  • EnvelopeSize10
JPEG
  • 4x6
  • 3.5x5.25
  • 4x4
  • 4x5
  • 4x4.5
  • DocTab
  • 6x4
  • 4x8
  • 7x3
  • 6x4
  • Mailer7x5
  • EnvelopeSize10
EPL2
  • 4x6
  • 3.5x5.25
  • 4x4
  • 4x5
  • 4x4.5
  • DocTab
  • 6x4
  • 4x8
  • 7x3
  • 6x4
  • Mailer7x5
  • EnvelopeSize10
ZPLII
  • 4x6
  • 3.5x5.25
  • 4x4
  • 4x5
  • 4x4.5
  • DocTab
  • 6x4
  • 4x8
  • 7x3
  • 6x4
  • Mailer7x5
  • EnvelopeSize10

Error Messages

In this section you can find the most common error messages, what they mean and how to solve them.

ZIP4 Data Value too large

This error usually occurs on older versions of the Multi-carrier application. See this guide.

'IO Exception: Read time out' or 'The remote computer refused the network connection. Error encountered (Log ID: xxxxx)

These error messages usually appear when there is an Endicia server outage.
Solution: please try again later.

"Failed to receive a valid Account ID" or "Account ID XYZ is invalid. Error encountered"

Please make sure you are using the latest version of the application and Demo mode is turned off.

Common Questions

In this section you can find our most commonly asked questions regarding this carrier. If you have a question not listed here please contact us.

How can I change the credit card linked to my Endicia account?

To change your credit card linked to your account follow this guide.

Where can I check my Endicia account status and add money to my account?

To check your account status or add credit to it follow this guide.

How can I change the contact information for my Endicia account?

To change your contact information linked to your account follow this guide.

How can I change my Endicia Passphrase?

To change your Endicia Passphrase follow this guide.

Can I hide the sender address when creating a Shipment?

You can very easily remove/hide the sender address when you are creating a USPS shipment.

If you are on the wizard page, under the Sender section you can check the checkbox.

You can also automate this when by adding USPS - Endicia: Hide Sender Address under Specific Carrier Fields in the Custom Address Source. 

Can I request shipping quote via the lightning quote button for USPS?

It is possible to request rates for shipping, however make sure to have USPS - Endicia: Weight Units set in the custom address source used for quoting.

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