88 Bank of Ireland branches across the country will close their doors for the last time today.
The bank is ceasing services at approx a third of all of its branches.
It claims that over the last three years, there has been a 60% drop in the number of customers visiting the branches in question, with a rise in those using online services.
Bank of Ireland says an arrangement with An Post, to allow for lodgements and withdrawals, will "protect local access to over-the-counter banking".
It says this will allow account holders to conduct transactions at more than 900 post offices around the country.
Customers affected by the closures have been written to in recent months, informing them of the changes and outlining where their accounts will be transferred to. Account numbers, sort codes, along with direct debits and standing order arrangements, will remain in place.
In Mayo, branches will close their doors for the last time from today in Ballyhaunis, Kiltimagh and Charlestown.
The closure of the Ballyhaunis branch means that people will have to travel to Claremorris or Castlerea, both around 20km from Ballyhaunis.
A protest outside the Ballyhaunis bank is planned by business interests this afternoon to oppose the bank’s decision to close the branch.
Following the closure of Ulster Bank in Ballyhaunis five years ago, the Ballyhaunis chamber of commerce said the area was now being left without access to vital services.
Despite a campaign to maintain the branch, and discussions with BOI management in recent days, services will cease there this afternoon.