came back to this thread due to a different trigger and noticed this response and would like to clarify so that it will benefit others.This is not true from my experience. My wife wanted to change her lastname to mine (XYZ). They officer came out looking for me to get copy of marriage certificate (Made in India).
If your green card was based on AOS from marriage, they should already have a copy of your marriage certificate in your file (in the officers hands)..and at citizenship process you can change your name to anything of your choice...having said that here is our experience..
. I got my citizenhip in Nov 2008 @ Fairax, VA and changed name(all first, middle and last), had to go to court for oath process. Used the court order for OCI and it was approved without any issues.
. My Sister got her citizenship in Dec 2009 at Newark, NJ and changed her last name to her husbands( was not asked for the marriage certificate)..got a court order for the name change..has not applied for OCI yet
. My wife got her N-400 approved and requested for a name change at Fairfax, VA was not offered a same day oath as she has to go to the court to take oath and complete the process. Also, she was not asked for marriage certificate