sentences:  Since the beginning of 2008, the purchase of a motorway sticker is handled electronically (known as an "e-sticker" or "e-matrica"), thus cannot be put physically on the windshield anymore, it is only registered in a computer system with its validity period.The highway cameras are checking the registered plate number and not the sticker itself.The 10 days, monthly and yearly stickers can be used for unlimited trips on every highway, within its validity period.