No acknowledgment or promise is sufficient evidence of a new or continuing contract, whereby to take the case out of the operation of this chapter, unless the same is contained in some writing signed by the party to be charged thereby, but this section does not alter the effect of any payment of principal or interest.
N.D. Cent. Code § 28-01-36
New promise must be in writing in order to extend limitation - Effect of any payment
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.