More than 3,000 people have lodged refund claims with the Commission for Aviation Regulation following the collapse of Lowcostholidays.
The Spanish tour operator ceased trading on July 15th, leaving an estimated 15,000 Irish holiday makers out of pocket.
Customers have until September 19th to submit their claims to the Commission over at aviationreg.ie.
The Commission says it is assessing the claims received so far and in some instances additional information and documentation has been sought.
It will cover the claims of those who were abroad when the company collapsed and had to pay a second set of accommodation.
Only customers who booked both overseas travel and accommodation will be taken care of, however.
People who only booked a hotel room or accommodation may be entitled to make a claim through credit card or travel insurance instead.