USCIS closed the case without deciding it on the merits. This usually happens when the case cannot move forward for a procedural reason.
What happens next
The notice explains why. If you disagree or do not understand the reason, seek advice before refiling.
Official USCIS wording
On September 9, 2025, we administratively closed your Form N-400, Application for Naturalization, Receipt Number XXXXXXXXXXXXX, and mailed you a notice explaining why your case was closed. Please follow the instructions in the notice. If you do not receive your closure notice by October 9, 2025, please go to www.uscis.gov/e-request to request a copy of the notice. If you move, go to www.uscis.gov/addresschange to give us your new mailing address.