Originally Posted by LAX_Esq

Update: I flew AB JFK-DUS-DME and then S7 from DME-ASB. I got the S7 boarding pass in JFK after they looked at my Turkmen LOI. AB gate agent at DUS who took my boarding pass asked to see my Russian visa, and I presented the Turkmen LOI again.

At DME, it was seamless. With my S7 boarding pass, I followed signs to international transit, showed my boarding pass went through security, and then entered the departure area. Nobody at DME asked to see anything re Turkmenistan or looked for a Russian visa.