Postal Explorer > Mailing Standards of the United States Postal Service, International Mail Manual > 3 Extra Services > 350 Restricted Delivery
Restricted delivery service is no longer available — it was discontinued effective January 27, 2013. (It was limited to First-Class Mail International items, Priority Mail International Flat Rate Envelopes, and Priority Mail International Small Flat Rate Priced Boxes when used in conjunction with Registered Mail service.)