I couldn't find an answer to this elsewhere but forgive me if overlooked.
My wife and I both have identical FAC certificates which is helpful. I used to have similar arrangement with my brother and dad before I was married 5 or 6 years ago. Back then on certificate renewal, the three of us were lightly reprimanded for "sharing" an ammo supply. Apparently we should have divided the ammo between us when bought, noted on our FAC certificates and kept records of who has what left.
As a consequence both my wife and I have bought ammo and kept records. We are up for renewal soon. Conveniently we both only have one small box of ammo left each. My question is - is it ok to simply name each cardboard ammo box and the amount of ammo left? Or should each ammo supply be under separate lock and key? (e.g. in small cash boxes in the gun cupboard, space is not an issue?)