My car insurance broker, Swinton, issued me with a letter to confirm that in July last year (2016) I had 12 years of no claims. Aviva who I insured with last year only go up to nine years NCD, so that's what they state on my renewal. Two issues arise from this now I want to change to another insurer. One is that I only have a document showing nine years NCD and if I quote that on my application I'm giving incorrect information. If I give the correct - now 13 years no claims - I cannot get documentary evidence from Aviva to prove it, so insurance will be refused. As insurers take off a number of years of your NCD if you make a claim, it is important to have your full entitlement declared. What would you advise?