As your Tide Card Reader will process sensitive card data, you must verify that the device you received is the correct one, and hasn’t been tampered with. There are a few ways to do this: Check that the box containing the machine hasn't been opened and that the security seal is still intact. The security seal is a red label with a barcode and a number, stuck across the lid of the box. Next, break the security seal and take the device out of the box. Verify that the serial number (S/N) on the device matches the serial number on the box. Inspect the device for tampering. Check for missing seals or screws, additional wires or labels, holes in the device, and anything inserted in or attached to any part of the device. If you have any concerns about your package or device then please contact Tide support immediately.