---
type: faq
title: "What happens if I mail an oversized postcard with a postcard stamp?"
description: "Using a postcard stamp on an oversized card means you have underpaid the postage, and USPS handles that in one of a few ways depending on your card. With a"
resource: https://www.4over4.com/faqs/postcards/what-happens-if-i-mail-an-oversized-postcard-with-a-postcard-stamp
tags: ["Marketing Materials", "faq"]
timestamp: 2026-07-20T18:54:40.856Z
---

# What happens if I mail an oversized postcard with a postcard stamp?

Using a postcard stamp on an oversized card means you have underpaid the postage, and USPS handles that in one of a few ways depending on your card. With a

Part of the **Marketing Materials** hub. See [all faq concepts](index.md).

- Page type: faq
- Hub: Marketing Materials
- URL: https://www.4over4.com/faqs/postcards/what-happens-if-i-mail-an-oversized-postcard-with-a-postcard-stamp