Sealing

Registered First–Class Mail International items and insured/uninsured parcels must be properly sealed so that possible tampering can be detected. Unregistered First–Class Mail International items may be sealed at the sender’s option.

Customers are responsible for sealing their own mailpieces, when required. Padded envelopes may be used to send international Registered Mail items, provided the opening/flap is properly secured.

Matter for the blind may not be sealed, even if it is entered with Registered Mail service.