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.. and as the saying goes .. once bitten twice shy .. I am just wondering what happens if a client simply changes printed pages of the written agreement we signed when those bad times come ... after all we just signed on the last page ..
What do you do to avoid that from happening?
Suggestion: use an MD5 or PGP/GPG signature on all pages, that is : take the contract page by page and apply a digital signatue algorithm to it and then print the signature somewhere on the page, and/or print all of them on the last page with the written signatures.
1) if the client tries to alter any page, they'll be unable to regenerate a new digital signature as you have the key
2) if you try to change the text, the client has the original with your signature and as you are the only one able to generate a valid signature ...