If you need an updated travel signature on your I-20: Request a Travel Signature through the MyiSCU Portal or schedule an in-person advising appointment. In order to issue your I-20, we are required to collect documentation that shows you have funds available to pay for the total estimated expenses.For travel health appointments, we recommend booking at least 4 to 6 weeks before your departure. Passports and Visas. The Santa Clara Post Office at 1200 Franklin Mall, Santa Clara, CA 95050 will accept walkins on Saturday, April 15, 2017 from AM to PM. You will need to submit supporting documents (e.g. , copy of acceptance letter, plane ticket, proof of new status, etc.) with this form. VTA ACCESS Paratransit service is provided to eligible individuals with disabilities who cannot use conventional accessible bus and light rail transit service. All of our community clinics offer low-cost routine immunizations for children. Some of our clinics offer low-cost immunizations for adults without insurance.