Myself and my wife separated in July 2017 and my wife got a bank loan and then decided she wanted to get an IVA .
My wife is now saying I signed for this IVA (Which I did no such thing ) and this is my responsibility too . She is saying she has a signed document with my signature on it . Which if true then has been signed fraudulently.
You should have had paperwork as well after the creditor meeting. I take it the payment comes from your ex's bank account? If you have nothing at all in writing and nothing coming out of your account I rather suspect she is trying it on. If you can't find yourself on the register you can look her up to find out the company dealing with it.
Did you provide any details when she went into the IVA? If she says you are also liable you would either have had a separate IVA or an interlocking one.
Also, if you had any joint finances, check your credit record as it may be impacted by the IVA.
Sharing from experiences of dealing with debt
The greatness of a man is not in how much wealth he acquires, but in his integrity and his ability to affect those around him positively.
Bob Marley. http://kallis3.blogs.iva.co.uk