I guess it is typical for propane dealers not to send out bills. When they make a delivery, they leave a bill and you are expected to pay it in a timely fashion. Ok idea, although i am used to dealing with a utility company that bills monthly for usage, but that's my problem...
Having said that, we added a gas dryer to our house in march. We had to have the propane supplier come out and modify the dryer from natural gas to propane. I knew there would be a service charge, the man who came out was very nice and handed me a receipt for the work. I expected a bill in the mail. Several months later i get a bill pas due with pas due charges. Called coast gas and got a really snitty lady "this is your second time on this account that you've paid late" who stated that i should have paid the amount shown on the receipt the tech gave me. I took that and my tail between my legs feeling pretty foolish. Then i found the receipt.
The receipt only stated that the work would cost $80 an hour and had no specific amount to be paid, nor did it state in was to be paid.
Needless to say, we are now switching to another propane supplier. I feel lucky that we did not run out of propane, according to other complaints on this list. Our new supplier has put a satellite gadget on the tank that tells them when we run low and need a refill. Gas is 40-50 cents a gallon cheaper that coast gas salinas. Good riddance, coast.