In July 1925, United States Postal Inspectors paid Susanville a visit. They deemed that residential mail service should be implemented.  There was work to be done. At least, in 1923, Susanville had implemented a housing number system. The postal service would provide residents free of charge mail boxes or the other option they would cut a mail slot in the front door. In November 1925, Postmaster C.D. Mathews ordered the installation of street signs.

On December 1, 1925 residential mail delivery was instituted. E.F. Unruh had the route that included the areas associated with the Fruit Growers Supply Company and Lassen Lumber & Box Company. He made his deliveries on a bicycle. R.C. Connor had the Halltown and Milwood districts and was provided an auto to make his deliveries. Herman Liidner had the incorporated city limits and he did his deliveries on foot.

Support