04/07/2026
Enterprise Payment System (EPS) Deposit Instructions
These instructions include general technical information and instructions for sending electronic funds into your EPS account. The information here is designed for trust customers (and debit customers who need to initiate a fund transfer to cover a debit return problem).
08/26/2025
Quick Start Guide for Informed Visibility® - Mail Tracking & Reporting (IV®-MTR)
This document provides high-level instructions for completing One-Time Queries and Data Feeds in the IV-MTR application.
10/25/2024
08/02/2024
MTEOR Registration Overview
New Mailers can register online for MTEOR through the Business Customer Gateway. This document outlines how to register for MTEOR.
09/14/2023
Parcel Data Exchange (PDX) API Customer Guide
This document provides a customer reference guide for Parcel Data Exchange (PDX) Web Application API.
Parcel Data Exchange (PDX) Mailbox User Guide
This document provides a customer reference guide for the Parcel Data Exchange (PDX) Mailbox Feature.
Parcel Data Exchange (PDX) Web Application User Guide
The Parcel Data Exchange (PDX) is accessed via the web and Application Programming Interface (API) to allow customers to send manifest files and receive outbound files from the United States Postal Service® (USPS®). This document provides the information necessary to begin using the web-based portion of the PDX application using a web browser.
12/06/2022
LACSLink® Developer Certification Procedures
This document contains developer procedures for LACSLink®.
12/02/2021
Automated Business Reply Mail® (ABRM) Brochure
This brochure provides an overview of the ABRM tool, its benefits, and a quick guide for getting started.