0

I have a project and i have to digitally sign a PDF more than once. I've tried to do this with TCPDF, but it seems that TCPDF allows only one Signature! because when I import the already signed PDF (with FPDI) and sign it, I have only the second sig. and the appearance (image) of the first one.

is that right?? or It's because FPDI didn't import the embedded signature?? and does TCPDF support incremental update??

  1. is there a way that i can sign the same PDF twice with TCPDF??
  2. or another Library that allows multiple signing with incremental updates??

Please any helpful Ideas or recommandations!

Best regards,

Wael_al
  • 51
  • 1
  • 1
  • 4

1 Answers1

1

With FPDI you cannot edit an existing PDF document but you import the individual pages into a reusable structure. Content outside of a pages content stream (such as annotations or digital signatures) get lost.

Setasign (I'm related to that company), the authors of FPDI, also offers the SetaPDF-Signer component, which allows you to digital sign PDFs in pure PHP. The component is not free or open-source as FPDI.

See here for how to sign a PDF document several times.

Jan Slabon
  • 4,736
  • 2
  • 14
  • 29