No. Its written down. Reminds me of when i was stopped by the police while riding my motorbike years ago.
I was asked if the bike was mine?
Yes i replied.
What is the registration number? While i was still sat on the bike.
My reply was i don't know it but if i needed to it's written down on the number plate at the back of the bike.
I was asked was i being funny!
I said no. Pointing to the rear of my motorbike there it is