- 104 - © 2018 unitech Electronics Co., Ltd. All rights reserved.unitech is a registered trademark of unitech Electronics Co., Ltd.MS652 User’s Manual3.17.5 Transmit US Postal Check DigitScan one of the following bar codes to select whether to transmit US Postaldata, which includes both US Postnet and US Planet, with or without thecheck digit.3.17.6 UK PostalScan one of the following bar codes to enable or disable UK Postal.Enable US PlanetTransmit US Postal Check Digit*Do Not Transmit US Postal Check DigitEnable UK PostalDisable UK Postal*