To obtain a transit visa you should provide (no earlier for 2 months) to the Embassy the following documents:
 

1. Itinerary of travel (you should indicate the specific dates (day by day) and the name of the  borders entry and exit  from the Turkmenistan, also date, your name, signature)
    
2. Visa application form (with colour photo)
    
3.  Questioner (complete data)
    
4. a copy of the passport (colour)
    
5. a copy of the visa of country, which you will enter after Turkmenistan.

Time a transit visa will take is approximately 3 weeks.