The waliy (guardian) of the girl has accepted the proposal by saying, for example, "I marry you my daughter", and the one who proposed has replied, for example, by " I accept," or "I am satisfied" (i.e. with his acceptance).

This takes place in the presence of two witnesses

The woman is legally eligible to marry the man according to Islamic shari'ah (that is she is not a Mahram of the proposer [those to whom the proposer is forbidden to marry. etc.]) Allah knows best.