Six months.You can turn stuff over to the police too. Say if you find it on the street or where ever. They hold it for ....3 months....maybe. I forget. Afterwards you can claim it. Finders, keepers. I once found 3-4 man on the street. Not in an envelope or anything. Didn't see who dropped it. Turned it in. Filed a report on the details. No one claimed it, so I got to keep it after the holding period expired.