http://www.newcitizen.us/after.htmlYou need to sign the certificate with your name exactly as it appears on the certificate. Don’t use the same abbreviated signature you use to sign checks, letters, or credit-card slips. For example, if the name on the certificate appears as John James Doe, then sign exactly like that "John James Doe." Even if you sign your name as John Doe or J. Doe or J.J. Doe, don’t sign it that way. To repeat, sign your name exactly as it appears on your Certificate of Naturalization. If you previously signed the photograph that is mounted to your Certificate of Naturalization, then sign your certificate using the exact same signature you used to sign your photograph, even if that signature does not match the full name shown on your certificate.
Before you sign the Certificate of Naturalization please understand two things:
1. Since most people don’t usually sign their name using their full name and since you only get one chance to sign your Certificate of Naturalization correctly, we recommend practicing your signature on a blank sheet of paper before signing the certificate.
2. When you are ready to sign your Certificate of Naturalization, sign it in black ink, preferably with a rollerball or felt-tip pen (like a Sharpie®). Use a pen that will leave a permanent, inerasable mark. Ballpoint pen ink can be erased and may fade over time.
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