Then you need to take a look at our latest checklist - it's a full sales receipt that you can print off, and it'll help protect you during a transaction.
It includes all the information you need to get before parting with your cash or your car, and takes all the hassle out of the selling process.
Used car sales receipt
What to look out for
The checklist is the latest downloadable factsheet to be added to our Help and Advice section.
Others on whatcar.com include information on how to buy a new and used car, how to haggle, how to sell your car, how to maintain your car and how to save fuel while you drive.
To find any of our checklists, click here.