N.D. Cent. Code § 32-19-07

Notwithstanding any other provision of state law, if a promissory note or other obligation and a mortgage, other than a first mortgage, upon real estate have been given to secure a debt contracted on or after August 1, 1993, a mortgagee may bring an action on the promissory note if the mortgagee waives the right to foreclose the mortgage given to secure the note. Allowing a mortgagee to bring an action on the promissory note or other obligation of the mortgagor if the mortgagee waives the right to foreclosure of the mortgage given to secure the note applies only to residential real property consisting of four or fewer residential units.