Complete Form I-751 and sign it
Include the filing fee and biometrics fee, if required
Include a copy of both sides of your green card
Include evidence of a bona fide marriage
Include a cover letter listing all contents
Make copies of everything for your records
Organize documents in a clear order
Place the forms and evidence in one package
Use a trackable mailing method
Mail the package to the correct USCIS filing address for your state
Keep the tracking receipt and delivery confirmation
Respond promptly to any USCIS notices or requests for evidence