M_Barnes and others have advised it is always best to require full payment for a mineral rights sale or lease be made – up front – in full – in the form of a cashier check (not a bank draft) because the acquiring person’s bank account may not have sufficient funds at the point in time I provide them with a signed and notarized agreement – meaning I am taking the risk I will not be paid without further and costly legal action. If the transaction is not made in person due to my living out of state, what is the best way, or ways, to handle that exchange? A trusted and independent third party would appear to be a good way to ensure my signed/notarized agreement and the cashier check are exchanged up front – meaning if the third party does not receive a valid cashier check in the full and in correct amount, the third party would be instructed to not give the buyer/lessee my signed/notarized agreement. Who should that third party be (a local attorney, a local title analyst, a local family member, my out-of-state banker, my out-of-state attorney. etc.)?