Documents for use in Tadjikistan require legalisation by the Russian Consulate. The fee is £150 per document and legalisation is expected to take 1 week. £300 per document for legalisation on the same day.
There is an Honorary Consulate for the Republic of Tadjikistan located at:
33 Ovington Square,
Tel. 020 7584 5111
Fax 020 7581 2669