If our support team requests the serial number of your terminal to assist with troubleshooting, you can find it as follows:
For the Loomis-pay A920 Pro, refer to this guide:
Loomis-Pay E800, refer to this guide:
Please note, a serial number typically looks like this: S/N:107XXXXXX for the E800 and S/N18XXXXXX for A920 Pro.