I am living in California and I have received an email from my apartment complex manager that states that packages not picked up from the mailroom as of Friday will be marked return to sender. Is this legal (given 18 U.S. Code § 1708. Theft or receipt of stolen mail matter generally)?
The key language to be taken notice of in that code is 'by fraud or deception'. If the property manager has provided reasonable notice of a clear-out, then the code doesn't apply due to lack of fraud or deception. But at the end of the day, just go and check the mail room on a Thursday afternoon and you shouldn't have any problems.