I thought I'd add another suggestion after a recent swap I did. When you send your return package, address it yourself or include a preaddressed label for it. I had one entry that hand wrote on the original package, didn't write the return info down anywhere else. I can't read the writing on the original package, so can't send it back to him. I have tried to contact him several times, but haven't received a response. So his package of flies are still sitting on my desk waiting for his info to ship back to him.