You can use a Covid certificate to attend Covid-safe events in Belgium. In that context, the term 'Covid-safe ticket' is used. A Covid-safe ticket is therefore not a separate document. It is exactly the same as your Covid certificate. Your Covid certificate is in effect a second entry requirement in addition to your purchased admission ticket. Such a Covid-safe ticket gives you access to events without having to wear a face mask or keep a 1.5-metre distance.