@Querist,
The notice of disowning son by getting it published in a newspaper is not binding under any law. Such notices are only for the purpose of bringing the fact before the public that there exist no relationship beween a son/daughter and a father/mother.Such notice is desirable as an evidence at a latter stage when dispute arises thereof between relations.
A son/daugher can be disowned by their parents and thereby making such son or daughter disable to inherit their self-acquired property.But this rule of disowning does not apply to cases where matter is of a property acquired by ancestors.
Son/daughter=son or daugher who attended the age of majority.
Note-This reply should be taken as per the declaration given in my profile page.
Thanks,
Regards,