Can't give them what you don't have.
Our Shareoplanne was re-registered a few weeks back, as the Trustee left the group and we nominated a new one (me). Certificate of Registration was requested by and returned to CAA. Put a photocopy in the 'plane in the interim.
One of our group members did a Le Touquet with the photocopy. No ramp check, but I had checked with the CAA before he went that the original had been received, just in case.