Here in Ireland, the form I posted earlier is from a book that the hospital keeps. Along with that book the hospital registrar goes to the registrar general (this was procedure in 1985) and is authorised to act as informant.
The pic is the section of my BC that shows the "informant"
There are 2 signatures on the BC, informant and registrar's...
Printed copy · Anthology Volume 9, page 342Printed copy from The Tender For Law Anthology, Volume 9, page 342 (printed 13 June 2014). Added by this site; not part of the Facebook export.