Usually you are required to turn it in to the police, and if unclaimed, it becomes yours after a period set by law, usually 90 days.
If you believe the found object has no value, you may dispose of it as trash, but, of course you may not spend it, that would confirm value, and hook you for theft.
Not always. I have read a few stories about people finding cash and turning it in only to find out that the city kept it once the clock had run out to claim it.
“Actually, yes, in most states, found money is still the property of the person who lost it.”
Unless the “found money” is taxpayer money, found by, say Solyndra or Fannie Mae “executives” or TARP bailout bonus beneficiaries and the like.
Serious?
A couple of crumpled fives and some soggy singles? The cops would give me a breath-alyzer right there in the station for walking in with that....
Right!!