That's not correct. If you hold customer information, then you are subject to GDPR - full stop. Name, address and contact number count. (I'm registered with the Information Commissioner's Office [ICO] for holding just this info). Whether you will be caught if you don't register with the ICO is another matter - but be aware that you are at risk. Laws are absolutes and don't allow for "common sense"As to the original question - holding just a string of numbers would not count as personal information and would therefore be Okay - PROVIDED that there is no way of linking them to people. As a comparison, you would think that a number plate on its own would not be personal information - but it is, since if someone got hold of it, in whatever context it appeared, and then had access to the DVLA database, they would be able to link the number plate and the context to an individual. So, if there is no way (other than your memory) of linking the numbers to people, you're okay, but if there is, then you're not.I caveat all this by saying that GDPR is complex and I'm not a lawyer!
Andrzej Kowalski ● 1050d