If they do not have the cash to pay a deposit of 10-30 percent, you need to have a contract or receipt for him, when it is time to settle if they default, you can rely on large sums.
If they are not paid in cash To ask for a deposit of 10-30 percent of your contract or receipt, at which time he paid if he fails to win you fasten it.
If they do not have the cash to pay, ask for a deposit 10-30 percent You want to have a contract or the receipt by him, which at the time the payment if they default, you can ยึดเงินก้อน there