Where must completed fingerprint cards be submitted?

The correct answer is the Arizona Department of Public Safety. This agency is responsible for handling fingerprint processing and background checks in Arizona, which is a crucial step for various certification and licensing processes, including those related to legal document preparers. Submitting completed fingerprint cards to the Arizona Department of Public Safety ensures that the fingerprints are properly analyzed and that the individual's background is assessed according to state regulations.

The other options do not serve this specific function. The Arizona Department of Social Services primarily focuses on public assistance programs and social services and is not involved in the fingerprinting process for legal licensing. Local police departments may conduct fingerprinting, but they are not the repository for fingerprints needed for statewide licensing checks. Finally, the state courthouse does not manage fingerprint submissions; instead, it handles legal proceedings and documentation related to cases presented before it. Therefore, the Arizona Department of Public Safety is the designated entity for submitting completed fingerprint cards in Arizona.