A new mother was left shaken and distressed after a healthcare assistant threatened to kick down her front door.
Zakhele Ntuli (38) was looking for the woman's ex-partner after the pair had a disagreement over money.
Judge Dermot Dempsey fined Ntuli €500.
Ntuli, of Myrtle Square, The Coast, Baldoyle, was found guilty at Swords District Court of making threats to cause criminal damage at Hastings Lawn, Balbriggan, on January 20 last year.
Sarah Maguire said she was at home with her three-month-old baby when she heard agg- ressive knocking.
She did not answer the front door but went upstairs and opened the bedroom window.
Ms Maguire said she recognised the defendant, who was a "friend of a friend".
He was shouting and threatening to wake up the whole street.
Ms Maguire said Ntuli also wanted to know where her ex-partner was.
He then threatened to kick her door down, she said.
Ms Maguire said Ntuli also told her he knew she had a young baby in the house.
He then left the area. However, he returned the next day with two other men and she called gardai.
Gda Vincent Turley said Ms Maguire was shaking and distressed when he spoke to her.
Gda Turley also spoke to the defendant, who told him he had given €5,000 to Ms Maguire's ex-partner to buy him a car in Belfast and he had not received the vehicle.
In his evidence, Ntuli said he was homeless at the time of this incident.
He claimed he was looking for Ms Maguire's partner as he had given him €500 to rent a room in a house.
He said the room had not materialised.
Ntuli denied he had been banging on the door, and said he never threatened to break it down.
However, Judge Dempsey found him guilty of making threats to cause damage.
Defence lawyer Deirdre Flannery said Ntuli was originally from Nigeria and worked as a healthcare assistant.