This discussion addresses the validity of one-sided registered agreements, specifically when a builder has not signed or been present for the registration. While a registered sale deed is generally considered legally valid even with minor errors, a one-sided agreement typically cannot be registered. The consensus suggests that such agreements are not valid, and the Sub-Registrar should not register them if one party is absent or unsigned. The primary remedy for such situations is to file a suit for specific performance to compel registration.