N.H. Code Admin. R. Saf-C 503.09
(a) In the event an applicant desires to obtain a particular registration number, the applicant shall apply in person or by mail, to:
The Office of the Commissioner
James H. Hayes Building
33 Hazen Drive
Concord, N.H. 03305.
(c) Notwithstanding (b) above, the same registration number may be retained in the event of a transfer of vehicle ownership to a surviving spouse, except for the following classification of plates:
Source. #7972, eff 10-17-03 (See Revision Note #1 at chapter heading for Saf-C 500); ss by #9995, INTERIM, eff 9-17-11, EXPIRED: 3-15-12 New. #10135, eff 5-23-12; ss by #13521, eff 1-13-23 (formerly Saf-C 503.10) (see Revision Note #2 at chapter heading for Saf-C 500)