You will need to supply your NCB relatively promptly after taking out cover via eavi. There are three potential documents that can be used as proof of your no claims bonus. You should have received from your previous insurer either: A renewal invite that states the number of years NCB that you’ve earned. A cancellation letter stating the number of years’ no claim bonus. A letter confirming the number of years’ no claims bonus. You may already have one of these suitable documents to hand. Alternatively, you can request your evidence by contacting your previous broker/insurer. For the no claims bonus to be considered valid, the policy’s expiry will need dated within two years of your new policy beginning.