If the voter did not fold their ballot correctly after voting the ballot box/booth controller should send the voter back to the voting booth to fold the ballot papers

No, that statement is generally incorrect. Election officials are typically not permitted to send a voter back to the voting booth to refold a ballot after it has been marked, as this could compromise the secrecy or integrity of the vote. The primary concern is that the ballot is deposited into the ballot box without revealing the voter's choices.