Books and Records
4 short videos covering every testable point in this unit. Pick a video below, or read any topic's full written lesson free in the CertFuel app, no signup wall.
Reconciliations and Current Records 
Timeline for Posting Entries 
Preservation and Electronic Storage 
Prohibited Books-and-Records Conduct Read this unit's lessons, free
Every topic in this unit has a full written lesson, free to read in the CertFuel app with no signup wall. The complete Series 99 course also includes adaptive practice questions and spaced-repetition flashcards, free through the end of 2026.