Yes, as of December 2016, all holders (both new and existing customers) of a prepaid card without automatic top-up are required to identify themselves, otherwise they risk having their card blocked and being unable to make/receive calls, send/receive text messages or surf the Net.
Please note: are you perhaps also using a prepaid card for your tablet, computer, alarm clock, oil-fired or gas boiler, lawn mower, elevator or any other type of equipment? Then this card will also need to be identified to avoid it being blocked as well.
To identify yourself, simply surf to www.proximus.be/identify with your identity card, PIN code and an identity card reader on hand. You can also identify yourself by topping up your Pay&Go card on this same link, using your Bancontact bank card. Or ask a member of your family to do this for you.
Don't have Internet access? Visit a Proximus Center near you.