Ulster Bank is asking employers to communicate directly with any employees who continue to have Ulster Bank accounts, to remind them to change their details to avoid any disruptions to salary payments.
It comes as the bank gets ready to begin the first closures of personal and business current and deposit accounts in the coming weeks.
A six month notice period for business current and deposit account customers expires in October.
Ulster Bank is advising any customer who has not been able to open a new business current account to contact them.
