Bank of Ireland will open 61 branches around the country for four Saturdays in October to support customers moving current accounts from Ulster Bank and KBC.
The bank said advisors will be on hand in the branches between the hours of 10am-2pm.
Customers who are ready to move their account can do so on the day and will need to provide at least one form of photo ID and one form of proof of address.
The opening of branches on Saturdays, which will involve a €1 million investment by Bank of Ireland, is the latest measure taken by the bank to make the account transition process easier for customers moving banks.
It follows the introduction last month of the bank's multi-product application form, which allows customers to open a new current account and apply for credit cards and overdrafts in one online application.
"Now, as many Ulster Bank customers reach the end of their six month notice period to close their account, we are further ramping up supports for customers who wish to open a current account," said Susan Russell, Director, Retail Ireland, Bank of Ireland.
"We appreciate some people may want face to face support and may not have the chance to visit a branch during the week.
"By opening 61 of our branches for four consecutive Saturdays in October customers can get advice in person or open an account with us there and then," she added.
The bank said the branches that will open on Saturdays were selected using a number of criteria including footfall to the branch and proximity to an Ulster Bank branch.
The 61 Bank of Ireland branches that will open are: