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ABCD
ACS™
ANKLink®
Address Element Correction (AEC)
Address Element Correction II (AEC II)
Address Information System (AIS) Viewer
Address Matching System API (AMS API)
Address Quality Solutions
Addressing Publications
Alternative Designs
Ancillary Service Endorsements
April 2021 Releases
April 2022 Price Change Releases and Price Files
April 2023 Releases
April 2025 Releases
Areas Inspiring Mail
Association For Electronic Enhancement
August 2020 Releases
August 2021 Price Change and Release Information
August 2025 Releases
Automated Business Reply Mail® (ABRM) Tool
Automated Package Verification (APV) System
Beyond the Mail
Bulk Parcel Return Service
Bulk Proof of Delivery Program
Business Customer Gateway
Business Portal (Formerly Customer Onboarding Portal)
Business Reply Mail® (BRM)
CASS™
Carrier Route Product
Category B Infectious Substances
Certificate of Mailing
Certified Full-Service Software Vendors
Certified Mailing Professionals and Certification Programs
Cigarettes, Smokeless Tobacco, and Electronic Nicotine Delivery Systems (ENDS)
City State Product
Computerized Delivery Sequence (CDS)
Corporate Information Security Office (CISO)
County Project
Current Web Service Description Languages (WSDLs)
Customer Acceptance Testing
Customer Registration ID (CRID)
Customer Support Rulings
DPV®
DSF2®
December 2021 Releases and Price Files
December 2022 Releases
December 2024 Releases
Delivery Statistics Product
Direct Effect test
Direct Mail Technology Integrator Directory
Direct Mail Technology Integrator Directory
Direct Mail Technology Integrator Directory Overview
Drop Shipment Management System (DSMS)
Drug Mailback Program
EFGHIJKL
Election Mail and Political Mail
Electronic Address Sequencing (EAS)
Electronic Documentation (eDoc)
Electronic Verification System (eVS®)
Enhanced Line of Travel (eLOT®)
Enterprise Payment System
Enterprise Post Office Boxes Online (ePOBOL)
Ethanol Based Flammable Liquids & Solids
Every Door Direct Mail® (EDDM®)
eDoc Submitter Permit Enrollment Guide
eInduction
eInduction Certification
FAQ's
Facility Access and Shipment Tracking (FAST®)
Fact Sheets
February 2021 Releases
February 2022 Releases
February 2023 Releases
February 2025 Releases
Find a Form
Five-Digit ZIP® Product
Full-Service Assessments
Full-Service Report Testing: Service Type Identifier (STID) Errors
Guide test
Guide to the Mailing Promotions Portal
Guide to the Mailing Promotions Portal
Guide to the Mailing Promotions Portal
Guide to Promotions & Incentives Program
How to Enroll in the Promotions
Industry Events
Industry Forum
Informed Delivery API (Application Programming Interface)
Informed Delivery Business Mailers Resources
Informed Delivery Case Study
Informed Delivery PostalOne! Resources
Informed Delivery®
Informed Visibility Data Feed Instructions
Informed Visibility® Mail Tracking & Reporting (IV®-MTR)
Innovations
Integrated Technology Enrollment Guide
Intelligent Mail Guides and Specs
Intelligent Mail Matrix Barcode (IMmb)
Intelligent Mail® Barcode
Intelligent Mail® Barcode (IMb) Encoder Software and Fonts
Intelligent Mail® Container Barcode (IMcb)
Intelligent Mail® Package Barcode (IMpb)
Intelligent Mail® Package Barcode (IMpb) ACS™
Intelligent Mail® Tray Label
Intelligent Mail® Tray Label Certification
Intelligent Mail® for Small Business Mailers (IMsb)
International
January 2020 Releases (Includes Price Change Information)
January 2021 Releases (Includes Price Change Information)
January 2022 Releases and Price Files
January 2023 Releases
January 2024 Releases
January 2025 Releases
January 2026 Releases
July 2020 Releases
July 2021 Releases
July 2022 Releases (July 2022 Price Change)
July 2023 Releases
July 2024 Releases
July 2025 Releases
July 2025 Service Standards Preview
June 2020 Releases
June 2021 Releases
June 2022 Releases (July 2022 Price Change)
June 2023 Releases
Known Issues List
LACSLink®
Labeling Lists
Lighters
Locators
Look Up a ZIP Code™
MNOPQ
MASS™
Mail Anywhere
Mail Incentives
Mail Processing Equipment Service Provider Licensees
Mail Quality Data through IV®-MTR
Mail Quality Reporting
Mail.XML to SKU Mapping
Mail.dat to SKU Mapping
Mailer Identifier (MID)
Mailer Scorecard
Mailers Technical Advisory Committee (MTAC)
Mailing Promotions Portal Multiple Pre-Approval Requests (Batch Upload)
Mailing Promotions for First-Class® & USPS Marketing Mail®
Mailing Services
Manifest Mailing System
March 2020 Releases
March 2021 Releases
March 2022 Releases
March 2023 Releases
March 2025 Releases
Marriage Mail Price Incentive
May 2020 Releases
May 2021 Releases
May 2022 Releases
May 2024 Releases
Merchant Returns API
Move Update
NCOALink®
National Postal Forum® (NPF)
National Zone Charts Matrix
New and Proposed Prices - January 2020
November 2020 Releases
November 2024 Releases
November 2025 Releases
October 2020 Releases
October 2021 Releases
October 2022 Releases
October 2023 Releases
October 2024 Releases
October 2025 Releases
OneCode ACS®
Operations
Other Resources
Package Intercept®
Parcel Data Exchange (PDX) API
Past Promotions & Incentives
Past Promotions and Incentives
Periodicals
Periodicals Accuracy Grading and Evaluation (PAGE) Program
Phone Provider Format–Hold For Pickup Notifications
Platinum Full-Service Certification
Plus One Product
Polywrap and Polywrap Manufacturers
Postage Evidencing Systems (PES)
Postal Customer Council® (PCC)
Premium Forwarding Service Commercial®
Pricing and Classification Service Center
Product Tracking System II
Product Tracking and Reporting (PTR)
Promotion Experience survey
Promotion Suggestions Form
Promotions Guidebooks
RSTUVWXYZ#
CVE-2021-44228 - log4j 2 Vulnerability Mitigation
RDI™
Reply Mail IMbA Promotion
Resources
SKU Definitions & Price Files
Safety Fuse
Seamless Acceptance
Secure Destruction
September 2020 Releases
September 2021 Releases
September 2022 Releases
September 2023 Releases
September 2024 Releases
September 2025 Releases
Service Hubs and Facilities
Service Performance Measurement (SPM) Mail Exclusions
Service Type Identifiers (STIDs)
Share Mail®
Sharps and Regulated Medical Waste
Shipper Paid Services
Shipping Services
SingleSource ACS™
Special Services
Stamp Fulfillment Services (SFS)
Standard Full-Service Certification for Mailers
SuiteLink®
Tech Sheets for APIs, Click-N-Ship, and USPS Ship
Testing Environment for Mailers (TEM) Using Mail.Dat
Testing Environment for Mailers (TEM) Using Mail.XML
Toy Propellant Devices
Traditional ACS™
USPS Informed Delivery PostalOne! eDoc Technical Support for Mailers
USPS Picture Permit® Indicia (PPI)
USPS Printer Directory
USPS Returns
USPS Ship
USPS Technical Specifications for Mail.dat and Mail.xml
USPS Tracking Electronic Services Certification
USPS® Container Requirements for Adult Birds
Visibility And Tracking
Z4CHANGE Product
ZIP + 4® Product
ZIPMove Product
2020 Earned Value Promotion
2020 Emerging and Advanced Technology Promotion
2020 Informed Delivery Promotion
2020 Mobile Shopping Promotion
2020 Personalized Color Transpromo Promotion
2020 Tactile, Sensory and Interactive Promotion
2021 Earned Value Promotion
2021 Emerging and Advanced Technology Promotion
2021 Informed Delivery Promotion
2021 Mobile Shopping Promotion
2021 Personalized Color Transpromo Promotion
2021 Tactile, Sensory & Interactive Promotion
2022 Earned Value Promotion
2022 Emerging and Advanced Technology Promotion
2022 Informed Delivery Promotion
2022 Mobile Shopping Promotion
2022 Personalized Color Transpromo Promotion
2022 Tactile, Sensory & Interactive Promotion
2023 Emerging & Advanced Technology
2023 Informed Delivery
2023 Personalized Color Transpromo
2023 Retargeting
2023 Tactile Sensory & Interactive
2024 Emerging & Advanced Technology
2024 Informed Delivery
2024 Personalized Color Transpromo
2024 Promotions & Incentives Calendar
2024 Reply Mail IMbA
2024 Retargeting
2024 Tactile, Sensory & Interactive
2025 Add-Ons
2025 Informed Delivery MPP Integration
2025 Promotions Calendar & Technical Information
2026 Promotions Guidebooks
99% Testing