The Football Association of Ireland will vote against Sepp Blatter in Friday's Fifa presidential election, says chief executive John Delaney.
Blatter, 79, is favourite to win a fifth four-year term after
saying in 2011 he would step down.
"Regardless of the good he claims to have done during his tenure, he has to recognise that Fifa has an incredibly bad brand image," Delaney told BBC Sport.
"We won't be voting for him."
England's and Scotland's Football Associations intend to support Prince Ali Bin Al-Hussein of Jordan - the only other candidate in the election in Zurich following the withdrawals of
Luis Figo and Michael van Praag.
Delaney said the FAI will also back Prince Ali and that Blatter should step down for "the good of the game".