In order to fully enjoy the Rich Pass feature, it's important to have the latest game update installed. If you notice that the Rich Pass icon is missing at the end of the season before you've claimed your Piggy Bank, don't worry - simply update to the latest version of the game. This will allow you to return to the Rich Pass and claim your Piggy Bank from the previous season, as long as you had already reached the piggy bank icon from your previous Rich Pass milestones.