English to Chinese Bus/Financial Law (general) 条款

Each eligible participant should "present" their MasterCard® card and valid original receipt(s) on that same day of purchase evidencing the Qualified Spend to representatives at the Information Center during regular business hour.

Customer must "present" applicable offer at time of purchase and use a valid MasterCard card to redeem.

第一个present当出具讲，第二个present怎么说好，offer翻译的优惠。谢谢！