Ryanair passengers say they are being refused funds for flights cancelled during the coronavirus crisis.
Customers who ask for a refund are being offered vouchers and those who want money told to join a refund queue which won't begin to be processed until the crisis has passed.
E-mails seen by the Irish Times, state the budget airline will not start issuing refunds until the Covid-19 crisis has passed.
The airline added: "As our payment agents are required to stay at home in the fight against the Covid-19 pandemic, payment security restrictions prevent us from processing cash refunds."
Passengers who have prepaid flights are being told to accept vouchers valid for 12 months instead.
The airline said: “We would like to invite you to use your voucher to book your next trip and we look forward to seeing you again on a Ryanair flight in the very near future.
"Should you prefer a cash refund please contact us... and we will place your request in the cash refund queue until the Covid-19 emergency has passed.”
Ryanair has been forced to ground 90 per cent of its planes until April 16, with only a handful of flights running between London and Ireland.
There is also a slimmed down service between Amsterdam, Lisbon, Brussels and Berlin.
Ryanair CEO Michael O'Leary claiming a normal schedule of commercial flights won't return until at least June.
Passengers who have their flights cancelled are allowed to claim a refund under EU law EC261, but airlines including BA, Easyjet and TUI are pushing to keep customers' money as their profits nosedive during the crisis.
Sky News report Airlines UK are asking that: "Carriers should also be permitted to issue vouchers instead of refunds and, should refunds be required, carriers should be permitted to defer payment until the crisis period is over and as defined by air traffic volumes, rather than time period."
British airlines have also been ramping up demands for a multi-billion pound bail out.
International Air Transport Association (Iata) called for urgent government assistance and warned that airlines would lose £215bn) in revenues in 2020.
In reply the chancellor, Rishi Sunak, said last month "taxpayer support would only be possible if all commercial avenues have been fully explored, including raising further capital from existing investors”.