For more information fill out our Contact Form submitted directly to the Court Liaison Unit, or call 408-537-1296. The lawyer advised him to submit a police clearance letter together with the i-485 to avoid delays.To obtain a clearance letter, for immigration or visa purposes, you must appear at the Campbell Police Department during business hours. The following are the basic steps to complete your request. If you've been the victim of a crime it's important to report it. From what I understand for the homestudy, you need both a letter from your local police station as well as Live scan fingerprinting that covers the FBI records. You must bring a valid ID document with a photograph, such as a passport or driver's license. If you need a clearance letter for INS, include a copy of the document specifying that a police clearance letter is needed to process your application. Follow the steps below before your immigrant visa interview at the US Embassy in San Jose, Costa Rica. The National Visa Center (NVC) does not require police clearance certificates for everyone seeking immigration.