ok tnx John, Tom, George, and others. i checked the expiration date  and it shows 31.12.2017 on most of the ones i have. So what to do with these? Post office doesn't want them... so how does one cash them in? I have been paying out $1.15 to send back qsls and would like to get something back. i don't send out qsl requests anymore... have all i need. hate to just throw them in the garbage! Cort