Documents for use in Belarus should be certified by the UK Foreign and Commonwealth Office by way of Apostille.
The fee is £75 per document and documents will be processed the same day if lodged by 2.00p.m.
The Embassy of the Republic of Belarus is located at:
6 Kensington Court,
Tel. 020 7937 3288 (Consular and Visa Section)
Fax 020 7631 0005