### Question
Can you define what mass mailing means?


### Answer
**Mass mailing** is defined as the following in *2 U.S.C. § 431*:

> a mailing by United States mail or facsimile of more than 500 pieces of mail matter of an identical or substantially similar nature within any 30-day period

#### Citation:
  - *2 U.S.C. § 431*
  - Heading: **CHAPTER 14-FEDERAL ELECTION CAMPAIGNS > SUBCHAPTER I-DISCLOSURE OF FEDERAL CAMPAIGN FUNDS**

