If I have just received a renewed card, do I need to re-register

No, you do not have to re-register your renewed card since the card number remains the same. You need to re-register only if your card number has changed due to card replacement/ re-issue/ upgrade.

If I have just received a renewed card, do I need to re-register

No, you do not have to re-register your renewed card since the card number remains the same. You need to re-register only if your card number has changed due to card replacement/ re-issue/ upgrade.