The slave who is jointly owned by two persons, and is emancipated by one of them, (this one) has liability (upon him to secure complete freedom for that slave). (Using translation from Muslim 1502)
عَنِ النَّبِيِّ ﷺ «فِي الْمَمْلُوكِ بَيْنَ الرَّجُلَيْنِ فَيُعْتِقُ أَحَدُهُمَا نَصِيبَهُ» قَالَ يَضْمَنُ