Sometimes, that is the case....but not always. However, I always recommend submitting the N-400 as soon as possible. After waiting 40 months for our I-751 to be approved, wife submitted her N-400. Four months later, both the I-751 and N-400 were approved after a combo intervoew.
Getting entry is not the same as proving citizenship. In many cases, the only proof of citizenship are either a US Passport or a Naturalization Certificate.
1. Married couples living in different parts of the world are not expected to have a lot of combined finances. The best evidence is that of time actually spent together.
2. If you are paying Paypal fees, you are doing it wrong. There is a friends and family method which results in no fees....other than maybe foreign exchange fees.
USPS Passport documentation required. You need both the Naturalization certificate plus a copy AND a separate ID and copy.
Step 1: Gather Documents Early
Generally, you should apply for your new passport as soon as you know you’ll be traveling internationally—at least several months in advance. Passport processing times may vary, so be sure to check the latest State Department service estimates. First-time applicants, minors, and applicants who need a new passport but may not renew by mail may submit their passport application at the Post Office. The U.S. State Department website explains what you'll need to bring with you.
Application forms (unsigned)
Proof of identity document and a photocopy of the front and back
Proof of U.S. Citizenship document and a photocopy of the front and back
Passport fees
Apply for a Passport in Person
I would submit a proper I-485 as soon as possible. This administration isn't playing around. Your spouse is deportable right now. There is no benefit in a delay. He cannot get a Green Card, he cannot apply to work legally, and he cannot start the clock for citizenship until he is a legal resident. All those things start with a properly filed I-485.
A simple interaction with any law enforcement could create a catastrophe.
The Pledge of Allegiance to the Flag: "I pledge allegiance to the Flag of the United States of America, and to the Republic for which it stands, one Nation under God, indivisible, with liberty and justice for all,"
You have 2 separate petitions. I would withdraw one of them....the one with the incorrect payment. It is extremely odd that they would accept an incorrect payment.
Here are the only questions they can ask. Are you referring to a question on this list?
https://www.uscis.gov/sites/default/files/document/questions-and-answers/OoC_100_Questions_2008_Civics_Test_V1.pdf
Correction:
Actually, my wife got the email from the local office 2 days prior to her interview:
"USCIS Applicant,
This email is in reference to your upcoming interview at the Dallas Field Office, it is for an I751(Petition to Remove Conditions) and N400 (Application for Naturalization) combination. It is imperative that your spouse accompany you to this interview, also that you bring proof of a marital union. Please refer to https://www.uscis.gov/i-751 for examples.
We look forward to meeting each you both at your interview in the near future."