Ukrainian citizens with biometric passports can enter and stay for 90 days in Belgium without a visa, according to the Association Agreement concluded between the European Union and Ukraine in 2017. This 90-day period may be extended up to a maximum of 180 days if the situation in Ukraine does not allow for a safe return at the end of the 90 days.
Ukrainian citizens who do not hold a biometric passport, but who have received a visa for Belgium, can also obtain an extension of their authorized stay up to a maximum of 180 days.
In short, Ukrainian citizens who are, or have arrived, legally in Belgium and who, due to the situation in their country, stay longer than the authorized stay, should not worry.
However, they are advised to go immediately to the municipal administration of their place of residence to declare their arrival and/or to request the authorisation to extend their stay in Belgium.