Just would like to make sure that my understanding is correct.
When I contact a travel agent in Turkmenistan for tours, they will arrange a Letter of Invitation (LOI) and issue to me.
If I cross the land border from Uzbekistan, I would need to show the LOI to the Turkmenistan immigration officers and they will then turn the LOI into a visa. Does it mean that I have to pay the visa fee at the crossing? And they only accept cash, and in exact change, in US dollars?
Another question is, can I arrange an LOI that allows me to enter at land border crossing A but leaving at another crossing B?