Any PDF to Mail | Automated Document Mailing Service

What Powers Our PDF-to-Mail Engine

A look into the automation infrastructure behind every mailpiece so you can send faster, smarter, and with confidence.

Automated Print Workflows

Upload or stream your PDFs to RelayDocs. Whether ad-hoc or scheduled, our system ingests, formats, and prints automatically without batching or delays.

Certified Mail with USPS Tools

Send USPS-certified mail (Forms 3877/3665), complete with barcodes, tracking IDs, and proof-of-mailing reports. All trackable via our secure portal.

Variable Data Printing (VDP)

Personalize each notice with smart templates; insert names, QR codes, page logic, and multilingual content dynamically, from your input files or data streams.

Address Cleansing & Postal Optimization

Ensure accuracy and postage savings with NCOA, CASS certification, intelligent presorting, and address hygiene powered by USPS standards.

Secure Data Handling and Compliance

SOC 2, HIPAA, and ISO 27001 compliant. End-to-end encryption, role-based controls, audit trails, and automated retention policies built-in.

Return Mail Processing

We capture and flag failed deliveries, reattempt valid ones, and feed intelligence back into your system to reduce waste and maintain compliance.

What Can You Send with RelayDocs?

RelayDocs supports a broad range of document formats, insert configurations, and USPS mailing classes to meet your organization’s regulatory, operational, and marketing needs. From transactional letters and government notices to reply envelopes and secure inserts, we ensure your communication gets delivered the right way, every time.

Supported Document Types

Bank & Transactional Docs - Invoices, bills, credit card statements, loan notices, account summaries, overdraft letters, etc.

Government & Regulatory Letters - Tax reminders, jury summons, compliance updates, court notices, voter registration forms, etc.

Healthcare Communications - Patient bills, medical forms, discharge summaries, insurance EOBs, pre-authorization letters, etc.

Checks & Secure Mailings - Checks printed with MICR ink on security stock, direct deposit stubs, and payroll communications.

Policy & Insurance Documents - Coverage summaries, premium notices, ID cards, policy updates, and legal disclosures.

Postcards & Notices - 4x6, 6x9, and 6x11 postcards for appointment reminders, delinquency alerts, or general outreach.

Insert Types & Stocks

Static inserts, flyers, disclaimers

Inline inserts – Folded, stitched, or loose inside mailpieces

BRE (Business Reply Envelope)

60lb / 70lb / 80lb stock

Heavyweight cover (100lb, 120lb)

UV Coating (1- and 2-sided)

USPS & Delivery Options

First Class Mail – For personal, transactional, and time-sensitive correspondence (2–5 days delivery)

Marketing Mail (Standard Class) – Bulk mail option ideal for promotions, notices, and newsletters

Certified Mail (with Return Receipt) – Legally trackable mail with delivery confirmation

Priority Mail – Expedited shipping with tracking; optional signature confirmation

Priority Mail Express – Fastest USPS delivery (1–2 days); custom workflows required

UPS Express – Enterprise courier service (integration required)

Why RelayDocs

Compliance & Continuity, Built-In

Purpose-Built for Regulated Industries

From IRS mandates to HIPAA-sensitive delivery, our mail automation stack supports your compliance needs with PDF-level encryption, audit logs, and fallback-to-email redundancy for failed deliveries. Built to work hand-in-hand with legal, finance, healthcare, and insurance sectors.

Fallback to Email if USPS Fails

If a physical mail delivery fails due to address validation or return mail, RelayDocs can automatically reroute that communication via secure email, maintaining delivery continuity.

Smart Envelope Support, Matched to Your Artwork

Single or Double Window Envelopes

Return Address Alignment to Window

Custom Envelope Layouts & Sizing

BRE & Static Insert Integration

End-to-End Visibility with Mail Intelligence

IMB Tracking (Single-file & Multi-file SFTP Reporting)

Scan Facility ZIP, Date, and Code Logging

Certified Mail: Signature Capture, Image Upload, Record ID Mapping

Daily SLA & Delivery Reporting

Critical Notices. Delivered Digitally or by Mail.

RelayDocs ensures your important PDF communications never go undelivered. If email fails, we automatically fall back to secure USPS mail giving you peace of mind and regulatory compliance, every time.

Get started Our Solutions

Compliant Communications for Every Sector

From regulated industries like finance and healthcare to public sector entities and insurance providers, RelayDocs delivers secure, traceable, and cost-effective document automation that meets your compliance and operational needs.

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