This study attemps to the power of knowing evidence has a letter c of the civil and to know this consideration a judge in gave a letter c in case the dispute of land ownership number 1654 K/Pdt/2005. The study use of normative examine a juridical. Reseacrh the denoting that a letter c or quatations letter c cannot be taken as a proof of ownership and with a when a sign. The proof of letter cc submitted In the trial having perfect as autentik certificate. Consideration a judge in answer this based of the dispute of land ownership by verdict criminal to certificates is defective so void by law because published by means an unlawful act. To get legal certainty that must be hoped resident register soil certificates to be published.

Key : Power, Proof, Letter C