<prompt> Human: Hello, so I purchased a used car. Original price was 4700, but during price negotiation I was able to lower it down to 4500, so total price with all fees and title transfer would be 4950. I have a bill of sale that states that total price with everything is 4950, signed by me and a dealer. I paid with cash. After a couple of days I received plates and sticker with title application receipt. In this receipt I see sales price of the car 2800 with 175 paid for sales taxes. What is better to do for me now? It really seems to me that dealer somehow lowered the sales price of the car to win like 100 bucks for himself. What should I do? UPD: Thank you for all your comments. I see a lot of discussion here, so I would like to add some information. I bought this car in Texas. I am not sure if this state charges taxes based on book value or just looks at sale value. The car also has rebuilt title checked it with friend-mechanic, condition is good, so I am not sure if you can apply book value for rebuilt car. The only one fee that comes from dealer is documentary fee for 50 bucks state maximum. I did not trade-in any car. So reading comments below, by now my plan is: 1 Call dealer, point to the mistake and ask for explanation. I dealer does not give me a meaningful explanation or ignores me Ill2 Report to IRS and DMV3 Extort shit out of the dealer. I want these sweet 1600Ill call the dealer tomorrow and try to keep this post updated.  <response>: This is definitely shady. Probably is some form of tax evasion. But it might also make registration cheaper, depending on your state. 