Hi Rob,
You do need to be careful, I have built quite a few carts in the UK and all but one of them ONLY deliver to the card owners address.
If neither shipping or billing address doesn't match I would not send them anything. Email them informing them that the information supplied is not correct and it is your obligation to protect the card owner.
Also ask them to phone you, from my experience if it is fraudulent its the last you will ever hear from them.



