No. Google Play credits are non-transferable and are always linked to a specific account.
No. Google doesn’t automatically notify you if you’re running out of credits.
Google Play credits don’t last forever. After a while, they expire. How long they last depends on how you earned them. Make sure to check the terms and conditions when you earn or buy Google credits.
If you’ve forgotten to top up your balance, just grab a Google Play gift card from Startselect!