Btw this one 1MM7nxN8GzvHcTWJcbypfYoUhs1NnvrgvJlet is not a correct address
Maybe the address is 1MM7nxN8GzvHcTWJcbypfYoUhs1NnvrgvJ
let. I have searched after remove the last 3 letters
let and see this is visible on blockchain and this address has also some balance 1.52400000 BTC but it has not also any outgoing transaction.
Yes that's correct, I am basically looking for where the bitcoin are so I can contact the exchange / wallet provider to potentially freeze the funds.