The admission of a sale by a non-owner and the sale by a non-owner

The questioner:
He says: Honorable Shaykh, may Allah grant you success. The author (may Allah have mercy on him) said: “If a person sells something, or gives it as a gift, or frees a slave, and then admits that it belonged to someone else, his statement is not accepted.”

The Shaykh:
That is, we are returning to the discussion we explained and finished. Yes.

The questioner:
He says: Does this not conflict with what we studied regarding the suspension of a non-owner’s sale until the owner’s approval?

The Shaykh:
What is this non-owner sale? He did not say this is a non-owner’s [sale]. He did not say this is a non-owner’s [sale]. This is so that the buyer is on clear notice, and [the seller] says, “This is my property, but I am selling it to you.” So there is a difference between a non-owner’s sale. In a non-owner’s sale, he explicitly says, “This is not mine, but I am selling it to you, and it is up to the owner’s discretion if he accepts.” Yes, so the buyer enters the transaction with clear knowledge. Yes.