If you just signed the confirmation letter and haven't signed the house purchase contract, you should consult the auction company. The father will make a statement to transfer the purchase right to his son and let the auction company issue a new confirmation letter.

If a house purchase contract has been signed, in addition to the above procedures, the parties must also agree to declare that the house purchase contract signed by the father is invalid through consultation between the two parties, and the son and the parties will re-sign the house purchase contract.