Hi Legal Experts, Could you please help me to know if a registered sale deed can be challenged. If so on what grounds. Is there any time limit to challenge. Because we have a property purchased under a registered sale deed 70 years back. Some cunning people have filed a case on the ground that a dummy name is present in the RTC in which they have interest. Can a presence of dummy name (who do not have any document to claim rights other than an entry in the RTC) be a ground for claiming rights? Thank you in advance.