He was asked—may Allah sanctify his soul:

A man established an endowment for a specified purpose and laid down certain conditions. The founder died before the endowment had been authenticated before a judge, and the deed went missing before that could be done. A separate record was then drawn up that conflicted with the conditions and provisions stated in the endowment deed. This record was authenticated before a judge two years after the date of the aforementioned endowment. The endowment deed subsequently came to light, containing conditions none of which appeared in the record, and came up for authentication. Is it permissible to prevent its authentication and implementation?

He answered:

Praise be to Allah. Under no circumstances is it permissible to prevent its authentication. Rather, if it can be authenticated, it must be authenticated and implemented, even if the record authenticated subsequently conflicts with it. Even if a judge has ruled on the basis of that record, he is excused because nothing contradicting it had been established before him.

However, if a document said to be the endowment deed comes to light, an opportunity must be afforded to authenticate it through the legally prescribed procedure. If it is authenticated, it must be implemented. And Allah knows best.