USCIS Guidance on Payment of N-400 Application Fee with a Credit Card
You may pay for your N-400, Application for Naturalization, using a credit card. There is no additional fee to pay with your credit card. The N-400 is the only form that can be paid for by credit card using the G-1450, Authorization for Credit Card Transaction.
Acceptable Credit Cards
You may use Visa, MasterCard, American Express and Discover. You may also use gift cards with Visa, MasterCard, American Express and Discover logos.
It was a long and painful journey of seven years. But, at the end I finally got my GC. Through out this procedure the only positive thing was the help and support I received from Mr. khanna's office. I first applied EB-3 in 2006. Got my EAD through EB-3 application. Then reapplied for EB-2 in 2012 and got my GC in August, 2013. Through out the process Mr. Khanna and his staff was so helpful and thorogh that it made my journey lot easier. I would specially like to mention Suman, Mathew, Seema and Bharathi for all their help extended to me. I can not experess enough thanks to them. I would recommend Law offices of Rajiv Khanna for anybody whoever need any help on immigration issue. They are simply the best immigration attorney in this country!