There are two type of account blocking in Pakistan due to money laundering in usdt.
1) Charge back scam
2)chain dispute
1) charge back scam : where person call his bank and ask for dispute payment and block your amount transfered.
How will you know it's charged back?
Bank will call you and send letter and ask you to prove the amount.
Note you can't claim that you sell usdt as crypto is made against banking system they will not approve it in this case your amount will be lost.
2) chain dispute : involment of FIA on someone complain of fraud in which FIA will block all the dispute account and amount transfer to all the parties..
Your debt will be block until you proof to FIA about the money...