Tester is right. It’s the owner’s responsibility.
For each car I buy, I start a manila file folder and put the purchase documents in it, sales brochures, registration. On the file folder I write the VIN, key code, radio code if any, etc. As repairs are done I put the documents in the file. I have made a chart for each vehicle, charting out what maintenance is due at what mileage/months, and update the info as the work is done. From time to time I add up what I’ve spent each year on maintenance, repairs, tires, batteries, etc. For me its one of the pleasures of ownership, but ranks below driving.
For my 1999 Civic it’s become a fat file folder.