Italian CAA doesn't believe integrity of UK ATOs GS completion certficiate and exam result documents because they are not approved by any CAA.
Actually, the person conducting theoretical knowledge examinations in the UK must hold a specific Ground Examiner authorisation (GR) issued by the UK CAA in accordance with guidance contained in CAA Standards Document 11. Typcially, that person is nominated within an ATO as the Custodian of Examination Papers (CEP) in accordance with Part ARA.300 and is authorised to conduct theoretical knowledge examinations on behalf of the UK CAA. A copy of the examiner's certificate should be sufficient evidence of approval along with the RF/ATO certificate if required.
I'm tired of all this. It'll be two years since I've started my PPL training.
One solution would be to move your medical records to the UK in accordance with the CAP 804 reference I have provided above, and have the UK CAA as your State of Licence Issue.
ifitaint...