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.