The only issue could be the check-in staff at your airport of departure if you do not have proof of intention to leave Thailand within the 30 days granted by a visa-exempt entry. KLM and Emirates staff where I fly from (Glasgow) always ask, but I always have a visa.
So, you DON'T have a visa. The financial requirements for an EXTENSION have not changed and as an Italian you can still get the required proof of income from your embassy.
Do you have a visa or an extension of stay ? If an extension, on what basis ? How are you complying with the financial requirements ? What is your nationality ?
That seems to be the consensus from a large thread on ThaiVisa.com . Once your Thailand Elite membership expires you are on overstay irrespective of the "admitted until" stamp.
Alex James, all visas from the Thai Embassy, London require an ONLINE application before you send any documents. Consulates cannot do anything by post, you have to go in person.If you want a 3 month Non O Visa, then the required documents have to be sent by the consulate for approval to London, this is done electronically but can take 1-2 days for approval.