My father passed away in Chandigarh 25 years ago. My mother transferred the property to her name, but only my two sisters signed the documents. She hasn’t shown me any paperwork or shared any details. Can I challenge this transfer without my signature?

Yes, you can challenge the property transfer. Under Indian law, a transfer of property without the consent of all legal heirs is invalid. Since you are a legal heir and your signature is missing, you have grounds to challenge the transfer in court, seeking your rightful share of the property.