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.
Thanks for Rajiv Khanna and his team for helping me in getting my Green card. We received our Green card last week after we opened Service Request. Thanks for helping all these days in getting EAD/AP without any trouble and much appreciate your kind responses. Thanks Prerna Mehta for your help all these days. Parthi