Let us say that the book price of the car is �4,000 � however you bought it from a family friend for �1,000. Once you present this receipt to the insurance company � they can justifiably claim you have lost only �1,000.
Many years ago, the company I worked for sold off its company cars cheap to their employees � I brought one of these cars. Three years later, it was written off (not my fault), and the other guys insurance company offered me �50 less than I had paid for the car � which I gladly accepted. Having accepted the amount, I realized that I should have asked for more � the car was probably worth at least �500 more.
Do you think the other guys insurance company would have given me �500 more than I bought a car for, three years ago, if I had given them the original receipt?
I don't think they would have offered me �50 less.