Authenticity of documentation is rarely necessary except for regulated professions for which registration is required (i.e. doctors, architects, engineers, etc.).
Ní minic a bhíonn gá le cruthúnas i dtaobh fíre na ndoiciméad, ach amháin i gcás gairmeacha rialaithe a gcaitear clárú ina leith (i.e. dochtúirí, ailtirí, innealtóirí, etc.).