A Check characters are optional for Code 93 and can be added as the last two characters, which are calculated values used to verify the integrity of the data Disable: The scanner transmits Code 93 barcodes as it is. Do Not Transmit Check Characters After Verification: The scanner checks the integrity of all Code 93 barcodes to verify that the data complies with the check character algorithm. Barcodes passing the checks will be transmitted except the last two digits, whereas those failing them will not be transmitted. Transmit Check Characters After Verification: The scanner checks the integrity of all Code 93 barcodes to verify that the data complies with the check character algorithm. Barcodes passing the checks will be transmitted, whereas those failing them will not be transmitted.