Is a marriage, solemnized with a printed contract from the internet, witnesses, a dowry, deferred dowry, and acknowledgment of paternity, but with its public declaration concealed for professional and personal reasons, considered a sin in Islamic law?

The aforementioned marriage is invalid and must be annulled, due to the absence of several fundamental conditions: the offer and acceptance (ijab and qabul), which, according to the majority of jurists, require verbal utterance, not writing; the condition of the guardian (wali), as the woman married herself off; and the condition of witnesses, which requires the presence of two witnesses at the contract session.

The contract can be renewed with the guardian's permission, along with his delegation to a representative, and the presence of two witnesses. It is not a condition for the validity of the marriage that it be publicly announced if it fulfills the conditions.

A Muslim should learn the matters of their religion and ask people of knowledge before proceeding with marriage. The contract should also be documented in court to preserve rights. It is not permissible to conceal a marriage to perpetuate custody, as a woman loses her right to custody if she marries a man who is a stranger to the child.