A party who has signed a written contract may be compelled specifically to perform it, though the other party has not signed it, if the latter has performed or offers to perform it on the latter's part and the case is proper otherwise for enforcing specific performance.
N.D. Cent. Code § 32-04-10
Specific performance compelled though contract signed only by one
Official source: North Dakota Legislative Branch. Reproduced from public-domain North Dakota statutes; confirm against the official source for the current text. Not legal advice.