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Handling a document version dispute

The email arrives: "that's not the contract we signed." Now there are two versions, two memories, and money in between. What you do in the first hour matters more than anything you argue later, because version disputes are won with file evidence, and file evidence is fragile in careless hands.

First hour: preserve

Stop touching the files. Don't open-and-resave, don't print to PDF, don't merge into a folder of renamed copies. Locate your original as you received or sent it, ideally still attached to its email, and copy it somewhere it won't be modified. Preserve the carrying email too; its date and routing independently anchor when that version existed. If the counterparty sends theirs, save it with the same care. From this point, work on copies.

Second: establish the record

Record each file's fingerprint, its cryptographic hash, which freezes "this exact version existed in my hands on this date" into something you can later prove. Then compare the two originals: are they identical except for rendering, does one descend from the other with appended changes, do signatures cover different spans, what actually differs page by page. The outcome usually collapses the dispute into one checkable fact, this clause was added after that signature, or your copy and theirs share no lineage and one of them never came from the exchange both sides remember.

Third: use it well

Lead with the evidence, not the accusation. "Our files show your copy contains changes appended after the signature, here's the comparison" gives an honest counterparty room to discover their own mistake, a stale draft, a wrong attachment, and gives a dishonest one notice that the file already testified. If real money rides on it, bring the comparison and both originals to counsel early; document examination this clean makes legal work faster and cheaper, and the preserved emails plus recorded hashes are exactly what authentication will want. This article is general information, not legal advice; a lawyer guides the specific situation.

FAQ

The other side only has a printout or scan. Now what?

Then your preserved electronic original becomes the best evidence in the room, and their inability to produce an electronic original is itself a fact worth noting. Compare your file's content against their paper version manually.

What if I already re-saved my copy?

Don't compound it. The email attachment, sent-items copy, or cloud version history often still holds the untouched original. Recover the earliest version you can and preserve from there.

Should I confront them before comparing?

Compare first. Half of version disputes are honest confusion, and opening with proof instead of suspicion saves the relationship in exactly those cases.