The "unseen guardians" of the title are the Postal Inspection Service, which investigates mail order racketeering; the Underwriters' Laboratories, which are shown testing electrical equipment, fire extinguishers, and large floor safes; and those who run orphanages, who assure that the children in their care are placed in proper adoptive homes.
| Crew | Clyde De Vinna | Cinematography |
| Editing | Mildred Rich | Editor |
| Writing | George Wallace Sayre | Writer |
| Directing | Basil Wrangell | Director |
| Writing | Samuel H. Chain | Writer |
| Writing | Doane R. Hoag | Writer |