N.D. Cent. Code § 32-18-01: Instruments for future conveyance - Cancellation - Owner must give written notice to vendee or purchaser

No owner of real estate, or owner of any equity therein, who shall make or execute a contract for deed, bond for deed, or other instrument for the future conveyance of any such real estate or equity therein, shall have the right to declare a cancellation, termination, or forfeiture thereof or thereunder, except upon written notice to the vendee or purchaser, or the vendee's or purchaser's assigns, as provided in this chapter, and such notice shall be given to such vendee or purchaser or such vendee's or purchaser's assigns, notwithstanding any provision or condition in any such instrument to the contrary.