Is there a CCJ?
What is the date of the statement?
It doesn't matter whether he has acknowledged it or not.
If there is a CCJ then there is a CCJ and it can be enforced.
If there is a CCJ then it has already been enforced.
However to get a CCJ there is no need for a signed original contract.
Can I clarify anything for you?
They don't need the signed original to enforce a debt. In fact, it is rare that a signed original exists now.
They can produce a deed of assignment easily enough to establish that they have authority to recover. That doesn't need to be an origiainl
The old consumer credit act did make requirements like that although caselaw provided a way around it quite often.
The new one is far less complicated.
As I have said really, they only need to show a deed of assignment to show that they have privity of contract.