Emerald Ancestors is a paid Genealogy site but if you are researching your ancestors from Northern Ireland then you really need to have membership of this site.
Membership is 10 pounds for one months viewing and i have found it to be of good value. If you have friends who have this membership then they can very easily do look ups for you. The records found are Birth, Marriage and Death. Emerald Ancestors has an Advanced search where you can pay to view what details are found on the Certificate. This is an instant viewing of the details ,a cheaper way is to order the cerificate from GRONI.