Ages ago, my aunt's cat got a draft notice. Mean, nasty old guy, he probably would have done well at war. My aunt ignored it at first, and then upon the second piece of mail, called to inform them of their mistake. This was before things were done by computers with no human touching them, too. They kept sending notices with more and more insistance, until one day, a couple uniformed guys came out to the house. When they asked to speak to the drafted party (who, it's true, had reached the age of service), she brought him out (along with his vaccination records) and they all had a good laugh. They gave him a bunch of stuff - t-shirts, hats, buttons, etc. Not long after that, he started getting other mail, and it's never quite stopped. He's long gone now, but for the last few years, she's been saying she figures he'll get his AARP card any day now.