In many cases, a VIN or serial number may be located on vehicle's plates or stickers, old insurance or registration cards, or repair records from a dealership. The identification or serial numbers of classic cars vary by maker, especially if the cars date back before the assignment of VINs.
Some sites, such as the Classic Car Database, provide online tools to determine the VINs of classic cars through specifications and engine VIN codes. The engine VIN code tool allows searches for cars made from 1953 to 1975, while classic cars from 1910 to 1975 may be searched by specification. Automuseumonline.com also provides the possible locations of VIN plates and stamps according to manufacturer.