PDF timestamping
You may want to sign and put a timestamp on your PDFs in order to give them a specific date. Archiving invoices or creating e-invoices require timestamp for instance.
Most of PDF certificates include a timestamp service not guaranteed for low volumes.
TBS X509 Sign&Login and Email Professionnel certificates can timestamp PDF by using https://sectigo.com/resources/time-stamping-server.
But, from a certain volume of signature, a timestamping local server can be needed.
RGS / eIDAS timestamping
Some documents, such as invoices, must meet particular standards regarding signature and timestamping. TBS provides Certigna RGS* and RGS** timestamping certificates.