I already have a Nectar card so how do I register to collect points with Sainsbury's Energy?

What will happen after I have registered with Sainsbury's Energy?

There is more than one bill payer living at my address - can we both register to collect Nectar points from Sainsbury's Energy?

What happens if I have a Nectar card but don't register it with Sainsbury's Energy?

How do I register if I don't have a Nectar card?

My Nectar card has been lost/stolen. What should I do?

My Nectar card number is not being recognised, what do I do?

I have more than one account - can I register them all?