---
type: guide
title: "How Double Sided Postcard Printing Works, Front to Address Side"
description: "How double sided postcard printing works: what 4/4 means, the address side rules USPS enforces, the coating that blocks addressing ink, and two sided file setup."
resource: https://www.4over4.com/guide/double-sided-postcard-printing-explained
tags: ["guide"]
generated:
  by: "process:4over4-mapp-build"
  at: 2026-09-08T01:19:44.025Z
timestamp: 2026-09-08T01:19:44.025Z
sources:
  - resource: https://www.4over4.com/guide/double-sided-postcard-printing-explained
    title: "How Double Sided Postcard Printing Works, Front to Address Side"
status: stable
---

# How Double Sided Postcard Printing Works, Front to Address Side

How double sided postcard printing works: what 4/4 means, the address side rules USPS enforces, the coating that blocks addressing ink, and two sided file setup.

See [all guide concepts](index.md).

- Page type: guide
- URL: https://www.4over4.com/guide/double-sided-postcard-printing-explained