24 hour chart checks?

At my facility night shift does 24 hour chart checks, where we look at the whole day and determine if an order was missed.

So today, an evening nurse wrote that she noted the order in the physicians orders but she didn’t not place it in the MAR. It was a telephone order for a one dose order for Kcl 20mg PO. She told me in report she gave it on her shift. 
 

My question is, how am I supposed to write order that on the MAR if I didn’t give it? We still use paper charting at this place. 
 

I’m my previous nursing career in home are, I never had to deal with writing other’s orders nor doing 24 hour chart checks.