A daughter-in-law is seeking to appeal the cancellation of a legal heir certificate that was initially issued for her deceased husband. The certificate, which correctly included her, her mother-in-law, and children as per Tamil Nadu law at the time, was cancelled by her father-in-law without her knowledge. The discussion clarifies that a father-in-law is not a Class I legal heir and suggests appealing the cancellation to the RDO, as the original certificate was legally obtained. It also advises on reporting potential corruption if the father-in-law improperly influenced the cancellation.