I was watching Cajun Pawn Stars last night, and some guy brought in $5,000 and $10,000 Brother and Sister Bills. Right when they explained what a Brother and Sister Bill was, my wife came into the room and started talking.

I kinda heard the explanation of why you don’t see many bills of this denomination (to easy to transport large sums of money or something like that), but I really wanted to know what a Brother and Sister Bill was.

Of course I turned to Google and thought, this should be easy! WRONG!!!

I couldn’t believe this question was not documented on some collector’s site! I posted the question on Answers.com, but I haven’t received any responses.

I finally found the answer!

A Brother and Sister Bill are bills which have the same serial number but on different denominations.

Basically the dude from Cajun Pawn Stars had a $5,000 note that had the same serial number as a $10,000 note which he owned.

I had never heard the term “Brother and Sister Bills” before this show, but then again I don’t collect money.