From 1864, any person whose marriage was to be celebrated by a Roman Catholic clergyman was required to have the clergyman fill out a certificate containing the information detailed below, and forward it within three days of the marriage to the Registrar. In practice, as had already been the case for other marriages from 1845, the clergyman simply kept blank copies of these certificates, filled them in after the ceremony, and forwarded them to the Registrar.
It is still important to remember, though, that legal responsibility for the registration actually rested with the parties marrying, not the clergyman.
The information to be supplied was: