Method for the authentic determination of the identity of a given document presented in electronic form by comparing the document in question with itself at a later date or with a copy made of the document in response to a request raised by a petitioner, characterised by comprising the steps of: - forwarding the document in original form to a satellite station (201...206) of a satellite system for recording the status of the document which station is in connection with the petitioner; - initiating a request from said satellite station (201... 206) towards a core system that is separated from the satellite system for accepting the document; - generating an individual and unique first code (ADNS1) associated with the document in the core system in response to the request; - returning the first code (ADNS1) to the satellite station (201,... 206) which had initiated the request; and there - associating the first code (ADNS1) in a unique and inseparable way to the document; and thereafter: - generating a transformed control value from the joint presence of the document and the first code (ADNS1) preferably by using a hash function; - storing the transformed control value in an attestation database of the core system at an address which is identical to the first code (ADNS1) or which has been derived from the first code (ADNS1); and for the purpose of establishing the identity between the original document and a document (D') to be authenticated that also contains a first code (ADNS1'), wherein the document (D') to be authenticated is allegedly identical with the document; - the document to be authenticated (D') is presented at a satellite station (201...206) of the satellite system, and there generating the transformed control value (TCV') of the document (D') to be authenticated in the same way as the transformed control value was generated; then - forwarding the first code (ADNS1') on the document (D') to be authenticated and the transformed control value (TCV') generated during the previous step to the core system, and there, reading from the attestation database the transformed control value that is stored at an address derived from the first code (ADNS1), and comparing the transformed control value (TCV') sent to the core system with the transformed control value read from the attestation database; and - in case of identity the authenticity of the document to be authenticated (D') is confirmed to the satellite station (201...206) which has requested the authentication, and in the opposite case the authenticity is rejected. - forwarding the document in original form to a satellite station (201...206) of a satellite system for recording the status of the document which station is in connection with the petitioner; - initiating a request from said satellite station (201... 206) towards a core system that is separated from the satellite system for accepting the document; - generating an individual and unique first code (ADNS1) associated with the document in the core system in response to the request; - returning the first code (ADNS1) to the satellite station (201,... 206) which had initiated the request; and there - associating the first code (ADNS1) in a unique and inseparable way to the document; and thereafter: - generating a transformed control value from the joint presence of the document and the first code (ADNS1) preferably by using a hash function; - storing the transformed control value in an attestation database of the core system at an address which is identical to the first code (ADNS1) or which has been derived from the first code (ADNS1); and for the purpose of establishing the identity between the original document and a document (D') to be authenticated that also contains a first code (ADNS1'), wherein the document (D') to be authenticated is allegedly identical with the document; - the document to be authenticated (D') is presented at a satellite station (201...206) of the satellite system, and there generating the transformed control value (TCV') of the document (D') to be authenticated in the same way as the transformed control value was generated; then - forwarding the first code (ADNS1') on the document (D') to be authenticated and the transformed control value (TCV') generated during the previous step to the core system, and there, reading from the attestation database the transformed control value that is stored at an address derived from the first code (ADNS1), and comparing the transformed control value (TCV') sent to the core system with the transformed control value read from the attestation database; and - in case of identity the authenticity of the document to be authenticated (D') is confirmed to the satellite station (201...206) which has requested the authentication, and in the opposite case the authenticity is rejected.