This could be an interesting Question.
I Found and iPhone 5S, I handed it into the police. After 2 Months they returned the Phone, no one claimed it. I have a Sticker on the back of the phone with police details on it. So in our country, that is proof of ownership. I am now the new owner of this phone. BUT.....It is a brick, as the security has been enabled. I have a start up screen that looks like a brand new phone and I must enter an iCloud account and password. I do not have this information. I have contacted Apple Help USA, They say I need a court summons ??? WHAT!!! I contacted Apple technical Support, ( basically they said NO ) SO. the Question is.... Is there a way around this? ( I am happy to send a photo with the police details on it. To prove ownership.) Thanks Anthony