UPS and Fedex are total scams.

I once had a shipment from the US via UPS and I had some COD charges (read brokerage fees). I had enough money lying around to pay exact change in chash. Three months later, I got a letter from a collection agency for some unknown charge. I called the collection agency and they wouldn't tell me what the charge was for unless I surrendered personal information. When I called UPS, I asked why they wouldn't send a bill to me before sending to colleciton. Well, they didn't have an answer for that.
They eventually told me what the charge was for and I told them that I paid the fee by cash. In the end, I lost and had to pay UPS since I had no proof that I had paid the bill already. It was obvious to me that that the courier had pocketed the cash and didn't report that I paid the fee. -+It was either that or get a black mark on my credit rating.

With Fedex once, I had a package delivered with no COD fees at all. Two months later, I received a bill for duty and brokerage fees that I didn't think I had to pay. When I phoned them, they told me that they don't charge COD fees with the type of service I received and would be subsequently billed for them. The item I bought cost about $60 CAD and had to pay $45 in brokerage/duty fees after the fact. The worst part is the item was very light and fit in a box smaller than a kleenex box.

Bottom line, only order from a company that uses USPS. I don't deviate from that.