What is the standard weight threshold for anonymous mail to be processed under USPS guidelines?

The standard weight threshold for anonymous mail to be processed under USPS guidelines is indeed over 13 ounces. When mail exceeds this weight, it typically requires additional handling and identification measures as the USPS has specific regulations regarding the delivery and processing of such parcels. This threshold helps in distinguishing between regular mail and parcels that may require more security or tracking due to their size and weight.

Typically, anonymous mail is under 13 ounces because it can be sent without the same identification requirements that apply to heavier items. Mail weighing more than 13 ounces is usually subject to different mailing rules, including the requirement for a return address, which is why those items cannot be sent anonymously. This distinction ensures the security and traceability of heavier mail, thus serving the interests of both the sender and the recipient.