Assuming you already have the VIN of your car, you can go to sites like carfax.com or autocheck.com and run a VIN check. You can also get a cheap vin check from NMVTIS accredited sites like Vinaudit.com,
There is no such thing as a "check VIN". I believe your brother may be saying that you need to check the VIN--or Vehicle Identification Number--of your car. To do this, you can visit www.autocheck.co.uk/HowToCheckVIN.html.
Your best bet is to look at the serial number or VIN and check it that way. You can find the VIN either in the drivers door jam or on the bottom of the windsheild. The VIN will be numbers and letters so you will have to de-code them