Registered Letters must comply with the weight and size restrictions for the Ordinary Letter. They must clearly display a return address. If they are closed by an adhesive sealing tape, each strip must bear your signature or any other mark so that parts of your signature or mark are visible both on the tape and the envelope. Registered letters may not be sealed by means of a stapler.
Insured letters must comply with the weight and size restrictions for ordinary lettermail and clearly display a return address and the
An insured letter must be sealed in such a way that it is impossible to tamper with the contents without leaving an obvious trace of violation. A postal envelope specifically made for sending insured items or any other similar single colour envelope that is not made of striped paper or bordered by a coloured band or frame, or that does not contain a transparent panel, may be used for packing. Also used can be a linen bag with stitches on the inner side, a sturdy multi-layer paper or a box made of cardboard, wood or other suitable material.
To seal your insured letter, use a specially designed safety label, adhesive tape or any other appropriate sealing material. When using safety labels or adhesive tape, each strip of tape and/or label must bear either a sender's stamp, a signature facsimile or any other form of authentication (business customers) or a signature (residential customers) so that parts of the impression or signature are visible both on the tape/label and the envelope. Insured letters may not be sealed by means of a stapler.
To seal an international parcel with a declared value, you may use a specially designed safety label, adhesive tape or any other appropriate sealing material. If you have used adhesive tape to seal an international parcel without a declared value, each strip of tape must bear a signature so that parts of the signature are visible both on the tape and the envelope.