The RM50 notes with the prefix of AA to AE are printed with the 50th anniversary logo at the reverse of the note. Despite the issuance of prefix AA notes in 2007, the rest i.e. AB to AE notes were not issued back then. They are recently released by BNM after overcoming the technical difficulties.
Total of 50 million pieces of notes bear with 50th Anniversary Logo issued (i.e. AA to AE)