You can request a Proof of Delivery for applicable mailpieces by using the USPS Tracking® Tool at USPS®. Select Proof of Delivery and follow the provided directions to receive a Proof of Delivery email either with or without a delivery address.
Return Receipt service (PS Form 3811) is available for: Priority Mail Express® (Form 3811 only) Priority Mail®, First-Class Mail®, USPS Ground Advantage™-Commercial™, and Parcel Select (if purchased with Certified Mail, Collect on Delivery (COD), Insurance over $500, or Registered Mail®)
Certified Mail provides proof of mailing and a delivery record, primarily used for important documents where confirmation of receipt is necessary. It is less expensive and faster than Registered Mail but offers less security.
What happens if the recipient is not available to sign for certified mail? If the recipient is not available, USPS leaves a notice slip and gives them 15 days to collect the mail or arrange for redelivery.
The addressee has 15 calendar days to pick up your registered mail with confirmation of receipt (in the Post Office or Post Point mentioned on the failed delivery notice). If the addressee does not pick up your mail within 15 calendar days, it will be sent back to you.
The registered letter with acknowledgment of receipt (LRAR) is of legal importance. First of all, it constitutes indisputable proof of both the sending and the receipt of a document, which is evidenced by the acknowledgement of receipt signed by the addressee, which is crucial in contentious or administrative contexts.