3,538. Money Found in Jerusalem
Hilchos Maaser Sheini and Neta Revai 6:9
If coins are found in Jerusalem, they are assumed to be secular money; this is true even if gold dinars are found with silver and copper coins. The reason is because Jerusalem’s city streets were swept daily. If they’re found with a shard that was marked with the word maaser (tithe), then they’re assumed to be second tithe money. This is the case most of the time, but during the three Festivals (when everyone went to Jerusalem and brought their second tithe money with them), any money found is assumed to be second tithe money.
Hilchos Maaser Sheini and Neta Revai 6:10
Money that is found in front of a cattle or sheep salesman in Jerusalem is always assumed to be second tithe money because we assume that most of his customers are bringing their second tithe money and using it to buy animals. Money found on the Temple Mount is always assumed to be secular because we assume that it came from the Temple treasury and that the treasurers have already transferred its sanctity to an animal.