Is it permissible to take private money from the buyer or seller in real estate marketing? Is it permissible to take all the money when I do the work alone without my partner who has not paid his share? And does the broker have a right to the money upon knowing the location of the apartment through him, and how is it divided?

Regarding the first part, if your work is affiliated with an institution or an individual, you are not permitted to take private money from the seller or buyer except with the permission of your employer. However, if you are independent, you may take a commission from either or both of them, as this falls under permissible brokerage.

As for the second part, the partnership is void if its capital is a debt, because it is stipulated that the capital of a company must be known and existing, and it is not permissible for it to be a debt or absent money. Consequently, if the capital and work are from you, your partner is not entitled to anything.

Concerning the third part, if the question is about a broker who directed you to the location of an apartment, he is entitled to whatever you agree upon as remuneration for his guidance, as the preponderant opinion permits sharing in brokerage.