My father, a Hindu, is the sole owner of a piece of land registered in his name. He informally gave a portion to his brother without any legal paperwork. Both my father and his brother have passed away. Is there a legal way for me to claim the entire property based on the registered documents, despite the informal transfer?

Under Indian law, an informal transfer of property is not legally binding. Since the land is registered in your father’s name, you have a legal claim to the entire property as his heir. However, your uncle’s heirs might also have a claim based on possession and adverse possession laws, which would need to be investigated further.