Explanation
During an inventory audit, if you accidentally scan the same asset twice, the Hardware Asset Management (HAM) application will automatically remove the duplicate records and only import the unique scans. This is because the HAM application uses the asset tag or the serial number as a coalesce field, which prevents duplicate records from being created or updated in the hardware asset table. Therefore, you do not need to worry about scanning the same asset twice, as the HAM application will handle the duplicates for you. References:
Audit your inventory, which provides a step-by-step guide on how to perform scheduled or blind audits of asset stockrooms and other locations using the Agent mobile app and the Now Platform.
Hardware Asset States, which describes the different states and substates of hardware assets and how they are used to track the asset lifecycle.
Importing Hardware Assets into ServiceNow, which provides a step-by-step guide on how to import hardware assets into ServiceNow using an excel spreadsheet, an import set table, and a transform map.