For years it was easy, put a check in a ziplock bag inside the lid of the tank. Can't do that anymore. Sais I was COD, so told them to put a card on file and charge it for the amount when the tank is filled. Gal said OK, it is done and you will have your delivery within 5 to 7 business days. Next day my card was charged $308.18. Three weeks later I am still out of gas. Multiple calls and keep telling me my local office has called me, but no missed calls, or voice mails and still no gas today the 21's from the 8th, the day I was billed not noing how much gas I needed.