Verification of the validity of the marking can be done with various free software, like Dike by Infocert (Goto website) or ArubaSign (Goto website). A complete list can be found on the AGID website (Goto website). For a quick and safe verification we recommend using the service made available to the National Council of Notaries at the link: where just enter the .tsr file and the work file to get a complete and reliable report immediately.