Parking validation is a system where businesses offer free or discounted parking to their customers as a perk. When a business validates parking, it means that they are paying for at least a portion of their customers parking, up to 100% of the parking price. Validated parking is usually offered in the form of stickers or coupons, which must be presented in conjunction with the parking ticket to reduce the parking payment due. This system is common in busy commercial or downtown areas where there is limited space availability and paid parking becomes a necessity. It is usually offered by stores, malls, outlets, and other shopping centers, as well as on-site service providers like salons, spas, and gyms. Most garages offer a limited amount of free parking with validation, usually between one and four hours.