This might be a little bit sticky if your DON was involved. But that oversight SHOULD HAVE been caught.
My most recent place required the 11-7 shift to do 24 hour chart checks; that could have been caught then. Also Unit Managers do double check audits, as should the next 2 shifts double check too. Supervisors are an option also. It's a system of checks and balances.
Opp'ty to make sure pt is on the feeders list, laboratory book, care plan initiated, safety alarms list, weight list, body skin check list (usually on shower day), pharmacy pyxis entry, personal effects inventory, denture/hearing aid/eyeglasses list etc and any other list you can imagine.
It's tough for any one person to do all an admission's paperwork, that's why so many subsequent checks are done so things don't get missed. Some places use a checklist for admissions (and one of the check-offs is that the check-off list was completed