The passport should be for your wife since the I-131 is for her. If for some odd reason the request is for your passport, you may apply for one at the U.S. post office in your area since you are a U.S. citizen.
You may consider sending a copy of your Naturalization Certificate, driver's license (front and back), and/or any other ID you might have. If you meant "I-130" not I-131, you should have sent your Naturalization Certificate and Passport or other ID in the initial packet and that may be why you are receiving this request for more evidence.
Always be sure to CAREFULLY read the instructions and you may consider hiring an attorney for future legal matters. Best of luck to you and your wife.
This is not legal advice and is only general information. I am not your attorney. No attorney-client relationship is formed by this communication.
Why don't you have someone review the RFE with you. Something doesn't make sense- if they are really looking for a copy of a passport, make sure who's passport they are asking for. I agree with my colleague- it makes more sense if they are requesting a copy of your wife's passport since it is her I-131 application that is pending.
Attorney Jennifer Ahn's answer is to provide general information only, and should not be construed as legal advice on any subject matter. The content of this answer is not intended to substitute accurate legal advice, which is relevant to all the facts and circumstances of your specific case. This answer does not create an Attorney-Client relationship. (847) 297-9200
Unlike the quite plausible concern of Ms. Marinello, I will assume that you are referring to an I-131 application for parole allowing entry into the country. For one thing, an I-131 for someone that doesn't yet have a legal visa to enter the U.S. indicates she may have a need for some reason to allow her to enter the U.S. pending her approval of her application or your petition. In either instance, for you to get a Request for Evidence (RFE) is even more puzzling. And if you were petitioning for her to have legal residence (I-129F), with an urgent need to obtain parole, what would that be? In either event, you should have already included proof of your naturalized citizenship, which would mean you should not be required to produce a passport, but she still would with an I-131 Parole Application. You definitely need a lawyer's oversight of something you may not understand, even if you read it carefully.
All answers to immigration questions should not be taken as legally binding advice. If you have an immigration issue, please call me at Pacifica Legal Services 805-290-4930 and make an appointment for an initial 30 minute consultation. Additional time is billed at $100.00 per 30 minute increments. Todas las respuestas a las preguntas de inmigración no deben tomarse como asesoramiento legal. Si usted tiene un problema de inmigración, por favor llámeme al Pacifica Legal Services 805-290-4930 y hacer una cita para una consulta inicial de 30 minutos. El tiempo adicional se factura a $ 100.00 por incrementos de 30 minutos.