-snip-
Isn't it so that if these are really large funds they will say that it is impossible, and then leave the case for 1 year and then recover it by themselves?
Is this about unrecoverable passwords of wallet.dat or other wallet files that are already sent to a "
company"?
And by saying "
company that recycles wallets", you mean any password-recovery services?
If so, then we can never be assured of since those are entirely trust-based.
But if you want assurance that the scenario wont happen, you can select the company with the option to send your wallet file's "
hash" instead. (
search their options)
In that case, they can try to bruteforce your password without getting access to the actual wallet file.