So, in short, your partner is liable as the guarantor?
I'm not sure I understand?
I'm afraid that isn't possible.
If the loan is in his name then he is liable. If he stops paying then he is at risk of being sued and them using bailiffs to enforce if need be.
You can't just opt out of liability I'm afraid.
If the loan is in his name then he is liable.
The fact that he has taken it for another person is no defence.
He could counter claim against that person although it is difficult to ascertain the circumstances of that agreement here.
Can I clarify anything for you?
But isn't the problem that he has been paying the loan?