This FAQ contains information about National Lottery Instants. Any National Lottery Instants ticket will have the Instants logo on it. Take the ticket and rub off all the latex covering on its surface with a coin. There are instructions on the ticket which will explain how to check if you have won.
Every ticket has a unique bar code and verification number.
Tickets have to be validated via the terminal before any prize is paid out. As with the on-line tickets, there is space on the back of tickets for players to write their name and address. The payment system is exactly the same as that of the on-line game with the size of the win determining where you can claim it. Each game is a separate new game in its own right. This variety will be part of the fun of playing, therefore, the exact prize structure will vary from game to game.