Is the marriage contract considered valid if the father had previously rejected the same suitor, and then later married his daughter to him without knowing that he was the same person?

If a young man is religious and has good character, he should not be rejected due to material or social differences. A young man should not deceive the guardian, but rather strive to persuade him and involve people of virtue as intermediaries. The young man's actions do not affect the validity of the marriage. It is advisable to exercise wisdom, deal gently with the father, and involve people of virtue as intermediaries if he becomes aware of the matter.