Is the marriage contract invalid if the guardian does not pray, and what must be done if it is invalid?

Abandoning the obligatory prayer is among the greatest major sins. A group of scholars has held that whoever abandons it is a disbeliever, outside the fold of Islam, while the majority differentiates between abandoning it out of denial and abandoning it out of laziness. If your father denies the obligation of prayer, then he is a disbeliever, and it is not permissible for him to marry you off. However, if he affirms the obligation of prayer but is negligent in performing it, then the preponderant opinion is that his guardianship for marriage is valid. If you wish to be cautious, you may renew the marriage contract through the closest guardian after the father, who is the grandfather, then the brother, then the nephew, then the paternal uncle, then the paternal cousin.