What Are the Odds?

I thought that the credit card receipt that fell out of the cabinetry catalogue this evening was mine. I couldn't figure out what I had bought. Then I noticed the date - 6/25/2002 - and the address of a local art center here in Colorado.  6/25/2002 - I'm pretty sure I was packing for a trip to Honduras to help build a church. I was married, but had no children. I didn't even get pregnant with Brandon until the end of that year. I had no idea we'd ever be living in Colorado back then.  What are the odds that a credit card receipt with the exact same last 4 numbers as my current credit card would be in my hands almost 11 years later?