If you have lost your receipt letter with the USCIS receipt number, it can be recovered. Schedule an InfoPass appointment with USCIS. An InfoPass appointment is made through the USCIS website. Generally, it’s the only way to get face-to-face access to a USCIS employee. In most cases, you will not be able to enter a USCIS facility without an appointment. At your InfoPass appointment, you can ask questions about your case and request your receipt number if necessary. Take your passport or other valid identification documents to the appointment.