FAA has published AC 61-98C: Currency Requirements and Guidance for the Flight Review and Instrument Proficiency Check. This document supplants the previous edition, published in 2012.
Most of the document appears to be an update to reflect changes to references and online resources. But instructors and pilots should note that the AC now recommends that pilots submit a form 8710-1 when they complete a flight review or instrument proficiency check.
1-8. AIRMAN CERTIFICATE AND/OR RATING APPLICATION.
a. Revised Airman Application Form. The FAA frequently updates FAA Form 8710-1, Airman Certificate and/or Rating Application, to meet the needs of the airmen certification process and the aviation community. CFIs, pilots, and stakeholders should note that the latest Form 8710-1 contains enhancements that include a new field for a flight review and another for IPC.
b. Flight Review and IPC. When a pilot satisfactorily completes a flight review or IPC, the applicant should provide, and the evaluating CFI should submit, a completed Form 8710-1 to the Airmen Certification Branch (AFS-760). The FAA does not require Form 8710-1 for a pilot’s flight review or IPC; however, the FAA strongly encourages all applicants and CFIs to follow this recommendation. An airman certificate application updates a pilot’s FAA record. Pilots should ensure that their data is current because up-to-date records benefit everyone. For example, a pilot’s total flight time and aeronautical experience determines insurance premiums. If a pilot loses his or her logbook, an FAA record is on file and available. Nevertheless, submitting Form 8710-1 for a flight review or IPC is optional.
c. Preferred Method. The preferred method for submitting an Airman Certificate and/or Rating Application is through the Integrated Airman Certification and Rating Application (IACRA) system. The FAA did not have the IACRA system updated at the time of this publication; but the latest Form 8710-1 iteration will soon be available in IACRA. IACRA is the web-based certification/rating application that guides the user through the FAA’s airman application process. IACRA validates data. It also uses electronic signatures to protect the information’s integrity and eliminates paper forms.
You can find the IACRA homepage at https://iacra.faa.gov/iacra/
You can find FAA Form 8710-1 online at http://www.faa.gov/forms/