In reply to Wakeman:
I obviously didn't make myself entirely clear but the post was already getting quite long. I had just placed an order, by E-Mail, with R-Comp before my Credit Card company called me. They said explicitly that the transaction that prompted the call was the one with R-Comp and explained that, given such a transaction, they also check a couple before and after. I think we can all see the sense in this.
And if they weren't my card company then they had access to all that company's security systems. I'm not embelishing the truth here.
Let me restate that there was no fraudulent transaction and no blame (whatsoever) on R-Comp. The fact remains that there is potential for fraud and, in my case, there was clearly concern at the card company. I was close to Spacetech when credit card fraudsters took them down and I saw the pain it caused - I don't want Andrew and co going the same way, either directly or through loss of customer confidence. Prevention is a whole lot better than cure.