Getting rid of riba (usury or interest) money after repentance

The questioner:
Abu 'Abd al-'Aziz says: Honorable Shaykh, regarding the one who repented to Allah with a sincere repentance from dealing in riba (usury or interest), how does he get rid of the money that came to him and became mixed with his pure money?

The Shaykh:
If a person repents and he has money from riba, he disposes of it by placing it in a public project, in a public project such as public restrooms and the like, things that people need and benefit from, because it is money that has no owner; it is lost money. And the one who repents from it, it is not lawful for him, and it has no owner, so he places it in public projects that benefit people, by way of disposing of it, not by way of charity. Yes.

The presenter:
May Allah reward you with good and bless you. This

The Shaykh:
If the riba is not known in amount, mixed in his wealth, and its amount is not known, he estimates it. He strives to estimate it, takes precautions, and gives out what he believes to be most likely to be from the riba.