Please see below for a message from USCIS regarding Form N-400.
Starting December 23, 2016, applicants must use only the 12/23/16 edition of Form N-400, Application for Naturalization (uscis.gov/n-400). USCIS will reject earlier versions of the form after that date. Applications postmarked or filed on or after Dec. 23 must also include the new fees (uscis.gov/forms/our-fees) or USCIS will not be able to accept them.
Special Note for Applicants at Group Processing Events
For applicants who received help completing their Form N-400 at an immigration group processing event (such as a citizenship workshop or fair), the sponsoring organization must provide its name, address, and contact information in Part 14 (for interpreters) and Part 15 (for preparers).
The sponsoring organization must also type or write the name of the organization representative who was responsible for managing the event, and the representative must sign and date the completed Form N-400.
The representative’s signature must be handwritten (a photocopy of an original handwritten signature is acceptable, but a stamped signature is not acceptable). USCIS will no longer accept stamps or stickers in the preparer and interpreter sections.
The representative may be required to later provide additional information or answer questions about the event and procedures.