RSA 282-A:50: Waiver.

A last employing unit or any employer whose account may become charged with benefits paid as a result of a determination by a certifying officer may waive, in proper form, in writing, his right to appeal from such determination prior to the making thereof. If such written waiver in proper form is made in such case, the determination shall become final as to the issues involved when made; and benefits may be immediately paid pursuant to such determination.