in possession of a VOA, she won't even be accepted on Immigration to apply for an extension, so there won't be any "application denied you have 7 days to leave the country" stamp. And her journey will probably already end at the airline check-in in Europe, if not then at the VOA counter of BKK airport. She will be refused entry. You are right = She has THREE alternatives: either she needs a 60-days tourist visa, or she must change the date of her flight to Thailand by 2 or 3 days later. OR she leaves Thailand for one day on the 15th day (she must however have a printed proof of this onward travel like a REAL airline ticket - not a "fake onwardticket") and re-enter by air and buy another VOA
yes you can, but be aware the Airline upon check-in can ask you for a proof of onward travel out of Thailand within these 30 days you will get stamped in. You either must have a return ticket within this 30 days period, or buy a cheap one-way ticket, like Bangkok to Siem Reap
you seem to be an Italian citizen, and I am just LOUDLY wondering if MAYBE you made a mistake at the airport, you went to the VOA counter and bought a 15-days visa-on-arrival for 2000.- THB, and entered Thailand with it. Actually, Italian passports will receive a 30 days stay permit when entering without a visa
You cannot extend the 90 days stay permit received when entering the country with a “single entry Non-Imm-O Retirement Visa” by the tourist extension of 30 days.
All you could do is exit Thailand and re-enter without a visa, if you are a citizen of a country that can get 30 days by entering visa exempt, you will receive a 30 days stamp and can extend this stay on Immigration once for 1900.- THB for 30 more days.
You can however, from up to 30 days before the 90 days stay permit expires, apply for the “1-year Extension of Stay Permit based on Retirement” if you fulfill the financial requirements .
. . . which are either a deposit of a minimum of 800,000.- THB on a Thai bank account in your sole name
or an income affidavit legalized by your embassy which proves that you earn more than 65,000.- THB per month
or, if your embassy doesn’t issue such an affidavit, a bank letter that proves you have transferred from abroad 65,000 THB onto your bank account, for 12 consecutive months, month for month
I just had a long conversation with a person who is married to a Thai wife, and who got the "1-year multi entry Non-Imm-O Visa based on marriage with a Thai" in Savannakhet a few days ago. He needed to show proof of finances. However, as he told me, while he was waiting in the queue, he was approached by an "agent" who asked him if he needed to circumvene the financial proof. He was assured by the agent that he could do so by paying 15,000.- THB (next morning pickup included) and for a "same day service" he would need extra 3000.- THB. I forgot to ask if the 5000.- THB visa fee was included in the 15,000.- THB