A 28-year-old man has appeared at Portlaoise District Court charged with having a false ID.
Garda Aodhan Ó Flaithearta told Judge Catherine Staines that he arrested Pitulan Anghel at Flat 9 Portlaoise Road, Mount Rath at 11.20pm yesterday.
When asked for ID he had produced ID in the name of Reitan Muntean.
When Garda Ó Flaithearta said when he got the light in the flat turned on it was evident this was not the correct ID.
A UK driving licence with a photo of the accused in the name of Pitulan Anghel was found on another person in the flat.
He was remanded in custody at Clover Hill until Thursday.
A 15-year-old person was taken into the care of social services during the investigation.
Gardaí say a 15-year-old girl who was the subject of an abduction report from police in South Yorkshire is no longer being sought.