typical intervals are every two years and every year. When a vehicle passes inspection, often a sticker (inspection decal or inspection sticker) is placed on the vehicle's windshield or registration plate to simplify later controls, but in some countries--such as the Netherlands since 1994--this is no longer necessary. Most US inspection decals/stickers display the month's number and the year.

In some jurisdictions, proof of inspection is required before a vehicle license