Optionally, you can make duplicate scans valid or invalid. Check ‘Invalid’ if you want the first scan to be Valid but all subsequent scans to be Invalid Duplicate scans.
However, to override duplicate checking when on, you can reset the status of all barcodes for this Service on a periodic basis. Thus, when the new period starts, the first scan will be valid. Then, all subsequent scans will be invalid duplicate scans. You need to enable this if you want to use the same Service over and over again.
When do you use the override? You can use it for certain access control applications. Also, please check ‘What’s Scanned and Not Scanned’ when tracking assets, attendance, security patrols, and maintenance crews.
For the reset to take effect with on-device (offline) Services your app users must:
a) Upload their scans from the device; and,
b) Refresh the app (or sign out and sign back in) with Internet connectivity after the new period begins.
c) After a) or b) above, it will prompt the app-user to download the database to the device. Also, the download includes a file that resets duplicates if configured for the Service.
Note: The reset does not change the associated validation database since the ‘scanned’ and ‘not scanned’ status of each barcode value is separately for each Service, not in the validation database itself.