> Merely changing the card number wont work because bank updates vendors with the new card. I've asked but they they have to update vendors, i don't understand

> Merely changing the card number wont work because bank updates vendors with the new card. I've asked but they they have to update vendors, i don't understand why though. Do they? My bank recently decided to send me a new CC for no clear reason (old one had like two years left to expiry) and without my asking for it, and it's been a huge pain in the ass because seemingly nothing updated automatically.