The Department of Enterprise, Trade and Employment is the competent authority for the issuing of occasional trading permits in Ireland. "Occasional trading" means selling goods by retail at a premises or place (not being a public place), of which the person so selling has been in occupation for a continuous period of less than three months ending on the date of such selling.
Application forms can be downloaded from the Department of Enterprise, Trade and Employment website linked below. These must be completed and returned along with the appropriate fee.
Applications must be made 30 days before trading begins and the fee is €95.23 for the first day plus €31.74 for each additional day or part of a day on which it is proposed to engage in occasional trading at the same venue i.e. €95.23 for one day, €126.97 for two days etc.
Occasional Trading Permit Application (DETE, external link)
Information correct at time of publishing, please contact the competent authority for further information.