My partner in business commits major sins such as Riba and bribery. I did not come to know about that until after we formed the partnership. There have been many disputes to end the partnership. What is the ruling on mixing his wealth and mine?
Sins of a partner does not make the partnership invalid. If a partner does other things that could undermine the company, such as dealing in Riba or dealing with bribes in the way he runs the company, or he engages in dealings that make the company’s income partially not permissible in Islam then this is a different matter. In that case you should separate from him and end the partnership. But if his sins have nothing to do with the company then this does not affect you and it does not affect the partnership.