A deceased person "Y" in his life time declared and claimed that "X" is his adopted son in absence of adoption deed and any evidence of give and take the child only single document showing a property purchased by alleged adopted son showing himself as adopted son of 'Y'which he written in sale deed "Y' had died long year ago and 'X' is realized rent of the property left by deceased 'Y' my quesion is whether alleged "X" is the absolute owner of the property left by deceased"Y" as sole successor ?