Can an injunction be vacated?

My grand has one son and he got 4 marriages not at the same but legally.second wife has one daughter, 3rd wife has one daughter 4th wife has one son.My grand mother registered half prtition in the name of Second wife daughter and on her husband. Now grand mother and son died. There is no will ,agremnet,registrion on her son , but The 4th wife son occupied entire property and filled a suit that the property has been gifted to him orally by his father and obtained injection order. The documnets he submitted are Encomburence certificate (it is inthe name of grand mother ) electrricity bill (in the name of grand mother son) . Is it possiible to obtained injectio order without proper documnet.what are options to ecxpidite the case as no proper documents submitted to claim.or options to evict 4th wife son from the possession of the property untill matter setteled in the court. Is it possible to request to vacate to injection order as no proper documents submitted.