The covenant of good right to convey, by its terms, is a promise that the seller has a right to convey the property. [SPYDELL v. PUSHARD, 2006 Me. Super. LEXIS 117 (Me. Super. Ct. May 17, 2006)]. It is a covenant that the party has not only an interest to be conveyed, but that he has a capacity to make the conveyance. [Parker v. Brown, 15 N.H. 176 (N.H. 1844)].
The covenant of good right to convey has been called synonymous with the covenant of seizin; it certainly follows as a necessary consequence that a person who is seized, has a right to convey the estate of which he is so seized. [Willson v. Willson, 25 N.H. 229 (N.H. 1852)].