Is there certification for iButton unique serial numbers?

We are often challenged by our customers about the uniqueness of iButtons. Secure systems can apply the unique serial number of iButtons for identification and duplicates can pose a threat to these systems.
Every iButton has a unique factory-lasered 64-bit registration number that ensures error-free device selection and absolute traceability because no two parts are alike. This is guaranteed by our datasheet and no additional certification is required.