For on-demand document notarization in downtown San Diego, Portable Notary Public operates from Ninth Avenue between Balboa Park and the East Village. The practice carries portable printing and scanning equipment to each appointment, supplementing the document-preparation infrastructure that Printing Solutions San Diego provides for downtown businesses who need hard copies produced before a signing. California's $15-per-signature notary fee, set by the Secretary of State effective January 2024, applies uniformly to acknowledgments, jurats, and copy certifications regardless of whether the notary travels to the signer's location. The Ninth Avenue base covers a service radius that includes Bankers Hill, the Gaslamp Quarter, and Hillcrest, positioning the operation within the densest ZIP code for notarization demand in San Diego County. Mechanics'-lien waivers and subcontractor payment affidavits for active construction projects require notarization before filing with the County Recorder, a document chain that contractors including Apex Ridge Construction in Middletown initiate during progress-payment cycles. Multi-page power-of-attorney packages requiring individual notarial certificates on the principal's signature, the agent's acceptance, and the successor agent's consent represent the most certificate-intensive appointments in the mobile portfolio.