Hi Marianne,
maybe this link is useful:
https://xamoom.com/en/
xamoom is a location CMS featuring NFC, QR codes and other identification technologies.
As far as I understand, they place NFC enabled stickers at different location, each NFC is personalized with an individual NDEF message containing an URL.
Example: NFC sticker 1 has the URL: www.yourserver.com/location/1
NFC sticker 2 has: www.yourserver.com/location/2
Once a smartphone reads the sticker, it opens the address on the smartphone (in order to provide individual content related to the sticker) and in background your server registers the access to sticker 1 or sticker 2, respectively.
Christian.