This stamps your PDF with a qualified timestamp from Sectigo (Europe) SL, an EU-recognised Qualified Trust Service Provider, proving the document existed at this exact date and time and hasn't been altered since. Capped at 50 MB. Your file is deleted the moment the timestamped copy is sent back — nothing is stored, backed up, or kept anywhere on this server, so the download is your only copy — save it somewhere backed up. Limited to 30 timestamps per day from one address, to stop automated abuse.