Manteca, CA Soliciting & Door-to-Door: No-Knock Registry (2026)

San Joaquin County does not maintain a centralized do-not-knock registry, but the county solicitation ordinance gives legal effect to posted no-soliciting notices. A sign at least 3 inches by 4 inches reading "No Soliciting" or equivalent language, posted at the main entrance, walkway, or driveway entrance of a dwelling, creates an affirmative duty for commercial solicitors to bypass the residence. Violation by a permitted solicitor is both an ordinance violation and potentially a trespass under California Penal Code §602(o) (refusing to leave posted property after request). The sign's effect is strongest against commercial canvassing; religious, political, ideological, and charitable canvassing are constitutionally protected under Watchtower v. Stratton and Martin v. City of Struthers, so a No Soliciting sign cannot legally exclude non-commercial speech, though most nonprofit canvassers honor the signs by practice. Residents experiencing repeat violations can file a complaint with the SJ Sheriff's Office identifying the permitted solicitor's employer and ID card number.