The Messenger of Allah ﷺ was asked about a find. He said: Make it known for a year. If its seeker comes, deliver it to him, otherwise note its container and its string. Then use it; if its seeker comes, deliver it to him.
أَنَّ رَسُولَ اللَّهِ ﷺ سُئِلَ عَنِ اللُّقَطَةِ فَقَالَ عَرِّفْهَا سَنَةً فَإِنْ جَاءَ بَاغِيهَا فَأَدِّهَا إِلَيْهِ وَإِلاَّ فَاعْرِفْ عِفَاصَهَا وَوِكَاءَهَا ثُمَّ كُلْهَا فَإِنْ جَاءَ بَاغِيهَا فَأَدِّهَا إِلَيْهِ