cash in advance
noun[U]
ukus(alsocash with order)COMMERCE
amethodof doingbusinessin which acustomermustsendtheirpaymentforgoodsat the sametimeas theysendtheirorder:
Cash inadvanceis the mostsecuremethodbecause itensuresfullpaymentbeforeshipmentof thegoods.
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cash before delivery
cash on delivery