Recently volunteered and paid the stamp duty clawback (from owner occupier to investor stamp duty rates) to Revenue for letting my house while I was on a circa 1 year career break partly in Ireland and partly abroad. I was the principal primary resident of the house both before and after the career break. If house was let under rent-a-room scheme I would not be liable for clawback. So, if I asked tennants at the time to retrospectively confirm that they rented house on rent-a-room basis such that they were happy for me to use it as a principal primary resident, can I claim that I was principal private resident of the house and therefore ask for clawback amount to be returned? Thoughts would be appreciated.