Mailing Standards of the United States Postal Service, International Mail Manual> 7 Treatment of Inbound Mail > 750 Extra Services > 752 Registered Mail
A number on an item of mail is not sufficient evidence of registration. A registry endorsement is also required.
The following are registry endorsements that may appear on Registered Mail items, depending on the language of the country of origin:
All mail registered by the country of origin must be handled in the domestic First-Class Mail mailstream from the exchange office to the office of delivery. A signed delivery receipt must be obtained at the time of delivery.
Any item without evidence of formal registration must be treated as ordinary mail. A sender’s registry endorsement on such articles must be crossed out.
Record and deliver in accordance with DMM 503 and POM 812.4.
When a Registered Mail item assigned for delivery is not properly accounted for, make a record of the available facts concerning the item and file the report, pending a possible inquiry.
If an inquiry is received from the sender (see 920), ask the addressee whether the item was received. If the item was not received, make a full report promptly to the appropriate Postal Service inspector–in–charge.
For detailed information concerning indemnity claims and payments for loss, damage, or missing contents for Registered Mail items, see 930.