28 C.F.R. § 540.23 Inmate funds received through the mails.
Title 28 - Judicial Administration
Except as provided for in part 506 of this chapter, funds enclosed in inmate correspondence are to be rejected. Deposits intended for the inmate's commissary account must be mailed directly to the centralized commissary account (see 28 CFR part 506). [69 FR 40317, July 2, 2004]
Title 28: Judicial Administration
PART 540—CONTACT WITH PERSONS IN THE COMMUNITY
Subpart B—Correspondence
§ 540.23 Inmate funds received through the mails.