Is a marriage contracted between two parties by signing a contract between them, but not registered or authenticated, considered a legitimate and permissible marriage?

For a marriage to be valid, certain conditions and pillars must be met, including: the guardian's consent and the presence of just witnesses who hear the offer and acceptance. What transpired between you, being merely a written agreement without a guardian or witnesses, is not considered a valid marriage. Therefore, it is not permissible for this man to be in seclusion with you or to look at you, as he is a stranger to you. If he wishes to marry you, he must propose to your guardian, and the marriage must be conducted in the presence of two just witnesses.