COVID CHECK BG is an official Android application developed by the Bulgarian Ministry of Health to validate the digital COVID certificate of the European Union. The app is designed to validate the certificate for vaccination, recovery, and negative test results from NAAT or RAT tests.

The app also provides validation for certificates proving recovery through a rapid antigen test or the presence of antibodies proven through a laboratory test. These certificates are only valid within the territory of the Republic of Bulgaria. The validation process is carried out by scanning the QR code on the certificate or document, and the app provides a visual representation of the certificate's validity.

It's important to note that COVID CHECK BG does not store any digital certificates or documents. It only validates them. This app is a great tool for individuals and businesses to verify the authenticity of COVID certificates and documents in Bulgaria.