Question:
A family came to us from the north on ever Shabbos and brought flowerws. We alter saw that there was a shekel in the flowers, we called them and they said that theyprobably dropped it and we could abviously keep it but I am concerned that maybe it was from the seller or other buyers and I'm not sure what to do with it?
Answer:
You can keep the shekel. Even if it was from the seller or the other customers, you didn’t find it until a while later, and the shekel has no siman. Therefore we consider it to be after yiush, and you can keep it. As a side point, as with other found items, maser has to be taken from it.
Best wishes
Sources:
CH:M 262-3. Even though it is a small amount of money, we still say that a person is aware of his money. See Igros Moshe Y:D 4-23, Hashovas Aveida Khalacha 5 ftnt. 8 in the name of R’ C. Kanievsky shlit”a, and ybchl”ch R’ N. Karelitz zt”l.