As it is informed, the flights for Hopa passengers and Batumi passengers are executed with the same aircraft. Passenger possessing the ticket for Hopa has no right to enter Batumi territory, even in the event that passenger passes the passport control procedures in Istanbul airport. According to the mentioned above, passenger must obey the rule, because of the price difference between Hopa and Batumi tickets. Passengers possessing tickets for Hopa must travel to Hopa, and passengers possessing tickets for Batumi must travel to Batumi. The mentioned issue is particularly actual for the passengers traveling to Hopa, with Hopa tickets, due to avoiding matters with the representatives of the Customs Department of Georgia. In order to avoid such misunderstanding, we would like to momentously notify the passengers traveling to Hopa or Batumi regarding their rights.
Exactly.
As I said previously (some 10 posts ago):
It's not unknown for IATA to assign two codes to the same airport, particularly when it serves two countries - Basel/Mulhouse being the obvious example.