Shaykh al-Islām—may Allah have mercy on him—was asked:

A sick man married during his illness. Is the marriage contract valid?

He replied:

A sick man’s marriage is valid, and his wife inherits from him according to the overwhelming majority of Muslim scholars among the Companions and the Successors. She is entitled only to the customary dower for a woman of her standing; by scholarly agreement, she is not entitled to anything beyond that.

He—may Allah have mercy on him—was also asked:

A man has a daughter who has not yet reached puberty. She was married off during her father’s absence, with no guardian acting for her. They claimed that her father had died, although he was alive, and testified that her maternal uncle was her brother. Is the marriage contract valid or not?

He replied:

If they testified that her maternal uncle was her brother, this is false testimony, and it does not make the maternal uncle her guardian. Rather, she has married without a guardian, so her marriage is invalid according to most scholars and jurists, including al-Shāfiʿī, Ahmad, and others. Her father may renew the marriage contract.

Anyone who testified that her maternal uncle was her brother and that her father had died is a false witness and must receive a discretionary punishment. The maternal uncle must also receive a discretionary punishment. If the husband has consummated the marriage with her, she is entitled to the dower. Her father may marry her off during the waiting period arising from the invalid marriage, according to most scholars, including Abū Hanīfah, al-Shāfiʿī, and Ahmad, according to the well-known view reported from him. Allah knows best.