A person who finds lost property does not automatically become the owner of it. Instead, the finder has a duty to try to return the property to its rightful owner.

If the owner cannot be found, the finder may be able to take ownership of the property through a process called "adverse possession." However, there are strict requirements for adverse possession, and it can be a complex and time-consuming process.

For example, to acquire ownership of lost property through adverse possession in New York, the finder must:

1. Take possession of the property.

2. Have the intent to possess the property as their own.

3. Continuously possess the property for a period of time (typically 10 years).

During this time, the finder must also pay any taxes or other charges associated with the property.

Here are some additional details about the law of finders keepers in New York:

- If you find lost property in a public place, you must turn it over to the police or the owner of the property.

- If you find lost property in a private place, you may be able to take possession of it, but you must make a reasonable effort to return it to its rightful owner.

- You cannot keep lost property if you know who the rightful owner is.

If you are not sure what to do with lost property, you should consult with an attorney.