Restricted delivery is a service that generally limits who may receive an item. It is limited to First-Class Mail International items (including Priority Mail International Flat Rate Envelopes and Small Flat Rate Priced Boxes) using Registered Mail service. The details of the service, however, are governed by the internal legislation of the destination country. Some countries will deliver only to the addressee in person and will obtain that person’s signature on the receipt. Other countries may permit delivery to agents of the addressee and/or may require only the signature of a postal official on the return receipt.