The UK has the difficulty that no such documentation is produced by Companies House (which is the official recorder of All Things Business).
I remember discussing with Nigel this exact problem a few years ago at a train station :)
The NCC has agreed that an affidavit with apostille is acceptable for M&As taking place in the UK. I think that affidavits or their equivalent are probably available in most countries, so that I would expect that where there is no "officially issued" M&A paperwork an affidavit should do.
Whether that is practical/possible depends on whether you need them from the acquirer, the acquired or both, however the caveat being ...
Note that in order to get an affidavit issued you will have to prove to the issuing authority that the merger/acquisition has actually taken place.
Sadly this isn't close to being true. You can post almost any document on a company letterhead to an apostile service in most countries and a week later you get back the certificate and a 50 euro charge to your c/card - no "proof" is generally asked/required Rob --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus