Documents for use in El Salvador 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 El Salvador Consulate is located at:
8 Dorset Square,
1st & 2nd Floors,
Tel. 020 7436 8282
Fax. 020 7436 8181