Is it permissible to deduct the cost of additional work that was not paid for from a partner's share of the profits without informing him, knowing that he is aware of the project's details but not the volume of profits?

The issue of "al-Dhafr" (seizing one's right) is the act of the oppressed taking their right from the oppressor when it is impossible to prove it. This is a point of contention among scholars. The preponderant opinion is that it is permissible if the reason for the right is evident, such as agreed-upon costs for extra work with a general manager who acknowledges them. However, if the right is not evident or is disputed, then recourse must be sought through the courts.