Why did I not receive my coins?

1. Check your journal
2. Restart the app

You should now have the coins. If for some reason you don't, email customer service.

Is your pokemon still defending the gym? It has to come back to receive your coins

Did you already receive 50 total coins already that day? Daily coin limit is 50 so if you already reached the limit, you don't get any more from any pokemon the rest of the day