This is what they said about notifying users: Google Wallet buyers will not be proactively notified. Keep in mind that if you do not remove your integration be

This is what they said about notifying users: Google Wallet buyers will not be proactively notified. Keep in mind that if you do not remove your integration before March 2, 2015, your buyers will get 404 errors upon checking out with Google Wallet for digital goods API. To preserve your user experience, we highly recommend removing your integration and migrating to another payment processing solution as soon as possible. (from https://support.google.com/wallet/business/answer/6107573 https://support.google.com/wallet/business/answer/6107573)