I’m just in the process myself as my parents and grandparents etc all Irish - I have to send my original full birth certificate and marriage certificate along with one of my parents full birth certificate and also my parents marriage certificate.
Also need to send proof of name and proof of address ie utility bill in my name and bank statement. The hard bit is the witness as they have to be either police, doctor, solicitor, clergy or a few other things. My doctor does not take the time to do these and I tried a solicitor who will verify the pics etc but won’t fill in the section on the form. I’m going to try an accountant next as they were on the list!
Fingers cro