Method for providing letters and parcels with postal remarks

(original) A method for providing mailpieces with postage indicia, whereby a customer system loads a monetary amount from a value transfer center via a data line, whereby the customer system controls the printing of postage indicia onto mailpieces and whereby the value transfer center transmits a data packet to the customer system, characterized in that the value transfer center generates a key and transmits this key to the customer system, in that, in the customer system, data is generated that is encrypted with the key in such a way that the value transfer center can decrypt it, in that the data is transmitted by the customer system to the value transfer center, in that the value transfer center encrypts the data, in that the value transfer center generates a random number, in that the value transfer center encrypts the data with the inclusion of the random number using a key that is not known to the customer system as well as using a key that is known to the security module of the customer system and subsequently transmits the data thus encrypted to the customer system.