WOW!! That is just wrong! They had NO RIGHT to open your package. I would definately be making some phone calls and writing letters of complaint. IF they needed to get the reciept from inside the package YOU should have been the one to open it to produce the documentation. They could have checked their own computers or called the sender to ask for the COD amount. They invaded your privacy which is DIRECTLY against their own policies. I would definately follow up on this. What if it was something deeply personal in that package (I know, of course your meds are personal but you know what I mean)?? That is not right at all.