Our house was given by a relative more than 20 years ago. The title certificate was also changed to my father's name. Do they still have the right to get it back?

Oux (one two I? bh？ C-ting ev development h? C-Ting property is the property of your parents. Half the property belongs to your father. Your father can write a gift book, and now write his half in the gift book and give it to your mother, you and your brother (just don't give it to the children outside).