A bond is not necessary if the purchaser pays in cashier's check, money order or cash (cash is capped at $10,000 per purchaser per sale date.) Otherwise, a pre-approved bond must be filed with a 10% deposit, both of which must be provided by the purchaser at the sale. If a purchaser does not have a bond and at least 10%, or full payment at the time of sale, the Commissioner will have to re-sell the property, and the purchaser who did not complete the terms of sale may be asked to leave the sale.