The links you need to note are these:
Application Forms (for sending by post): here
General Contact form: here
New GRO Home page: here
(PLEASE NOTE: These links, and indeed the entire welfare.ie site, seem a little unstable today. If you find the links return error messages, try again later.)
€4 'research copy' certificates are still available using both methods provided the full index reference number is supplied with your application.
You'll see on the Application Form page that you can also apply for some certificates online. These are the full-whack certificates required for legal use and cost a thumping €20 plus postage. Only the following registrations can be purchased through this route*:
- Births registered anywhere on the island 1864-December 1921
- Births registered in the Republic 1922-present
- Marriages registered anywhere on the island January 1913-December 1921
- Marriages registered in the Republic 1922-present
- Deaths registered in the Republic 1924-present
*See more at my Toolkit's Irish Civil Registration page.