A premium subscription in CamScanner should automatically remove watermarks. If they keep appearing:
Check that premium is active in the app settings. If the status isn’t shown, restore the purchase via Restore Purchases.
Check how the document is created/exported — in some cases, exporting to a free PDF format keeps the watermark, while paid formats remove it.
Clear the app cache or reinstall CamScanner to resync the subscription data.
Create a new document — scans made before the premium activation may still have the watermark.
If watermarks continue to appear on all new files, this is likely a service error. Contact CamScanner support and provide:
a screenshot of a sample document;
proof of subscription payment.
If CamScanner does not remove watermarks despite an active premium account, file a complaint on Xolvie. This helps document the issue and pushes the service to fix the problem faster.