How to, or who can check a documents originality?

[tight fart]

How can I go about getting a document checked for originality?
I signed a document about 5 years ago and I'm now taking legal proceedings over the outcome.
The other party have now come up with 2 documents, one I did sign and another that I don't believe
I did, obviously if I can prove they have faked it the case is pretty much over.
At the moment I only have copies in pdf format.
Anybody know how I could get them checked?

[Amateurish]

Ask to see the original?

[marshalla]

Depends how they've done it, but there may be some indicators/hints in the PDFs themselves.

Feel free to PM me and I might be able to help or suggest someone who can.

[TwistingMyMelon]

Indeed as above meta data in PDF could help

[marshalla]

TwistingMyMelon said:

Indeed as above meta data in PDF could help

Amongst other things in the PDF.

[jonamv8]

My understanding is you can remove or edit metadata

[davepoth]

jonamv8 said:

My understanding is you can remove or edit metadata

You can, but in my experience most people are too dumb to use google to find out how. I bet it will be very sloppily done, probably by photocopying your signature and gluing it to a photocopy of the other document. Maybe they used Microsoft Paint to do it if they were feeling clever. First thing I would do is compare the signatures on the two documents to see if they are identical.