in the US, if you have more than 50% of the bill, your bank can send it into the Federal Reserve & eventually you'll get credit for it in your account
while you're there, you may as well take in the jar of coins you've found and they can use the coin counter & add that money to your account too -- this is a free service at my bank for account holders
admit to not finding many bills but
i usually end up between $40-60 in coin by the time i feel my bag is too heavy
