Just had a student say he had done his microlight exams at an overseas school, but they have no record. And they haven't given him a licence application form (102M) with the relevant bits filled in.
He didn't know any better.
My suggestion:
Print on the front of the exam paper a warning to candidates to get their form filled in and signed immediately after the exam.
In due course, get the results filed online direct to the CAA.