14.3.1 Validity and Value.
Domestic money orders are paid regardless of the time passed since their issue. Money orders are not interest-bearing instruments; they are paid only in the exact amount...
You can cash them at any post office or your bank. Or you can take them to a check cashing place and they will cash it, but they will charge you 5% to do it.
i dont know why u would want to know this,but i looked it up.and i couldn't find it so im asuming money is somewhere along the lines of paperPaper in a warm moist landfill will decompose in 2 or 3...