Double Registration

Sir, I (Narayana(plot-59) & my father (thirupal (plot-60) as purchased two plots at Nellore, Andhra Pradesh in 2003. Since, then they are vacant. In 2010, somebody has intimated that these plots already sold to his father by somebody else in 1987 and accordingly they have shown EC. EC contain their father name but executors are different. We told them that we are absolute owners as we have purchased in 2003. They moved to court to get permanent injunction in 2010. We have argued with all relevant documents that they don't have any rights on property and it is in our possession since 2003(but we don't have any document regarding possession or tax). However, after detailed arguments, court has dismissed their petition on 26 jul 2018 stating that plaintiff has not provided suitable documentary evidence to claim their ownership. Hence dismissed. But court has not mentioned any statement regarding absolute ownership. In view of the above, it is equested to clarify, How to remove their name from EC and to prove the possession of the property what are necessary documents excluding sale deed.