How do I seal my slip?

At the bottom of the slip there is a Seal my slip button. Tapping it seals your slip: it is in play, it is graded at full time and it counts in the crowd percentages.

You need your account

You can build your slip without an account, but you have to be signed in to seal it. If you are not, the same button opens the sign-in window, and your slip is sealed as soon as you are in. You do not lose what you already answered.

Before the match starts

Slips can be sealed until kickoff. After that nothing can be sealed or changed.

You know it is sealed because the panel says "Your slip is sealed" and the button becomes "Edit".