You say that you're are a paid Member. You are though not paying for advice. The BenefitsandWork Forum is a discussion Forum and the replies are all qualified with this sentence "Nothing on this board constitutes legal advice - always consult a professional about specific problems". As you are in Managed Migration you will have a record on DWP CIS Searchlight. This is the IT system that UC uses for ID verification via a telephone Biographical Test. You could send a UC Journal Message requesting a Biographical Test to verify your ID.
David
Nothing on this board constitutes legal advice - always consult a professional about specific problems