Before you seal the envelope, check your application package one more time for these common errors. Don't submit original documents unless the instructions specifically ask for them, as what you send in generally is not returned. Check the signature and dateForgetting to sign the application is a surprisingly common mistake, and an unsigned form gets returned outright. Keep a copy of everything, and track the packageKeep photocopies of your application and documents before you send them. Getting these details right the first time matters, especially because, as of July 2026, proof of citizenship applications are taking 19 months to process.