1. All of the plaintiff's claims are dismissed.

2. The costs of lawsuit shall be borne by the Plaintiff.

According to Gap evidence No. 1, it can be acknowledged that the registration of ownership transfer as stated in the purport of the claim has been completed by the plaintiff in sequence due to sale and purchase.

The plaintiff asserts that since the plaintiff did not sell the land of this case to the defendant (appointed party) and the appointed party due to the cause of the claim of this case, the transfer of ownership of this case should be cancelled as the cause invalidation.

Where the registration of ownership transfer is completed with respect to real estate, not only the third party but also the former owner is presumed to have acquired ownership based on a legitimate cause of registration. Therefore, the disputing party should assert and prove the cause of invalidation.

(See Supreme Court Decision 2010Da75044,75051 Decided January 10, 2013, and Supreme Court Decision 2010Da75648 Decided November 10, 201, etc.). The Plaintiff’s assertion is without merit, inasmuch as there is no evidence to acknowledge the allegation that the transfer registration of ownership in this case is null and void.

All of the plaintiff's claims are dismissed.