---
type: article
title: "Business Cards in Mailboxes, the Law Most Marketers Ignore"
description: "Leaving business cards in mailboxes? Learn USPS rules, legal risks, and smarter direct mail alternatives that actually work. Get the full guide now."
resource: https://www.4over4.com/article/business-cards-in-mailboxes-the-law-most-marketers-ignore
tags: ["article"]
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/article/business-cards-in-mailboxes-the-law-most-marketers-ignore
    title: "Business Cards in Mailboxes, the Law Most Marketers Ignore"
status: stable
---

# Business Cards in Mailboxes, the Law Most Marketers Ignore

Leaving business cards in mailboxes? Learn USPS rules, legal risks, and smarter direct mail alternatives that actually work. Get the full guide now.

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

- Page type: article
- URL: https://www.4over4.com/article/business-cards-in-mailboxes-the-law-most-marketers-ignore