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.
I am quite thankful to Rajiv Khanna and his staff for getting Green Card to me and my wife. The case manager for my case is Bharati. She handled my case very well and huge kudos to her in getting the GC. Bharati is quite knowledgable in immigration matters. She responded to all my questions quickly. Her response time is very qucik. She applied Labor Certification, I-140, 485 and EAD Renewals. She is quite friendly and good going to work with. I am very thankful to Bharati for her continous support through out the Green Card Process. Thanks once again to Rajiv S Khanna, Mathew for getting my Green Card approved. Appreciate all your help.