The backlog of 50,000 passport applications will take at least a month to clear, according to the Department of Foreign Affairs.
Members of the public face another day of queues outside the passport office in Dublin as the busy Easter holidays approach
In a last-ditch bid to avoid cancelling travel plans some citizens are even testing their eligibility for British passports
As the dispute continues, the union at its centre has warned that action could escalate if no favourable agreement is reached.
"The backlog in the passport office is still there and if this dispute is not settled, the thing will begin to get worse as the weeks pass," said Blair Horan, General Secretary of the Civil, Public and Services Union (CPSU) which represents around 13,000 lower-paid civil servants.
"This dispute still has to be settled, and there is no lack of determination (on the part of the CPSU) to settle this dispute on terms which are acceptable to the lower-paid."
Mr Horan and CPSU President Denis Walshe are later to address the union's annual delegate conference in Galway, which enters its second day today.
Meanwhile talks between the Government and ICTU to solve to public sector pay row will also resume this weekend.