Locals use the Pedulililungi app to show them some QR code for verification purposes.

Since we could not get the app to work we simply just carried our physical CDC cards around. They always ask if there is a checkpoint before to enter. They never really looked hard though. As a foreigner they usually don’t really put much scrutiny in checks. You can also show them a picture of your card on your phone.

I recommend carrying both a picture of your vaccination card as well as the physical card at all times. Use the picture first and if they happen to not accept then show the physical card.