I mailed my application to a USCIS lockbox weeks ago, but I have not yet received a receipt, and my filing fee has not been cashed. How do I contact USCIS about my missing case, since I do not even have a receipt number to reference?
Answer It is possible to eMail USCIS lockbox support at lockboxsupport@uscis.dhs.gov to inquire about a filing that has not yet been receipted. You should include the form number, petitioner or applicant name, date of birth, and mailing address, as well as the lockbox the package was...