My notice. I got just returned from Turkey. Besides their national currency, Turkish Lira, I saw that vendors, hotels and service providers have switched to Euro. Previous time I have visited Turkey was two years ago, and that time I've made all payments in USD. Now it was Euro everywhere. And that was not only in tourist area. They write prices in Euro, but give you receipts in TRY with a remark like "0.2 EUR = 5.80 TRY".
I'm going to have to disappoint you
For example, since 2018 approximately, when Russia took offense at Turkey, and did not think of anything better as a ban on visits to Turkey by Russian citizens - in Turkey, in the tourist zone payments were accepted in dollars, euros and Ukrainian hryvnia
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We used to vacation in Turkey all the time, since about 2003, and then the dollar was almost "the second official currency". Now I communicate with friends who are Turkish citizens - the dollar is also accepted. The only nuance - the turnover of EURO has increased, as the number of tourists who used to bring dollars - residents of Ukraine, Russia, Belarus - has decreased. Europeans, it is logical to assume, go with their EURO.
PS Here's another example - a friend's mother sells Turkish things. She travels independently and buys in Turkey. She settlements with manufacturers in dollars, and no one refuses to accept them
Maybe this is just local thing in Antalya and Kemer. As a european, I used to take dollars also with me all the time we visit Turkey. This time I was focused more on vacation, so I barely took US dollars with, because I did not plan to leave hotel at all. Was surprised to see EUR everywhere. Maybe this is just local Turkish smart move, as they charge 1 USD = 1 EUR rate.
P.S. I have planned not to spend much and did not take much USD - paid in EUR instead. My plan has failed...
I don't know about you, but in my eyes it kind of bizarre how a country can switch between currencies in such a drastic manner. I can understand the impact of inflation and how it can force people to adopt a new de facto foreign coin, but if they switched from dollars to Euros because the influx of tourists, then it makes me believe Turkey must be a country which heavily depends on tourist, rather than international exportation of goods, because in the international market the USD is still the standard, specially in western ones.
It is ok for Turkey to make currency switch, as tourism is their third biggest income source.