Hundreds of international students have called for answers after the English language school they had been attending in Dublin city centre closed without notice this week.
The Irish Business School had been operating on Burgh Quay, with a staff of 18 teachers.
About 330 students from around the world were attending classes, or had recently enrolled to attend courses, at the college.
Another school, run at the same premises, was closed down last week, after Eden College lost its State accreditation in February.
The Irish Naturalisation and Immigration Service expressed concern at the sudden closures of both schools.
It sought to reassure students that the closures do not invalidate their immigration permission.
The INIS also said it has had a series of discussion within the education sector to explore other course options for those affected and who want to continue their eduction.