Independent TD Mattie McGrath and 5 others are occupying the Friends First Finance Headquarters in Loughlinstown in Dublin.
In a statement this afternoon Deputy McGrath said it was in response to an incident in Co.Wexford last week.
The South-Tipperary TD said a family was left 'terrorised' by the incident.
The group is seeking a commitment from the Bank that it will not send agents to carry out repossessions ignoring the Code of Conduct for Business lending to Small and Medium Enterprises.
The statement says a 2-hour meeting with the institution has ended unsuccessfully.
It goes on to say that Deputy McGrath and the others are remaining in the building until such a commitment has been made in writing by the bank.
Deputy McGrath spoke to Beat 102-103 about the sitaution.
