This seems all messed up by SMARTMIXER.IO besides 10
BTC is a good amount of money to exit scam for small businesses.
(screenshots, guarantee letter, records in the blockchain, I can provide the private keys of the address from which it was sent, I can sign the message through the address, I can provide email logs, I I can provide access to private messages on the forum, I CAN PROVIDE ANY INFORMATION REGARDING THIS ORDER)
Guarantee letter should be enough.
You do not need to give the private key of the address, you can just sing a message using the address to prove the ownership of the address if necessary.
Yes you are right.
Nevertheless, I can go for such measures.
I and other users tried to understand how you can verify their signature of the letter of guarantee, unfortunately no information on how the signature is generated is not on the site. I also tried to get a hash - from the public data in the guarantee letter - to no avail.
I suspect that "smartmixer" - just might say - * the signature is not mine (but no one can check), I didnt have you, I dont know who you are * - given the size of the amount sent.