Recognise what it is
Whoever receives it works out the kind of event: a food safety complaint, a quality complaint, a , an equipment failure, staff illness, or an inspection.
A polite comment about a sliver of plastic counts as food safety. So does a call the next day about feeling sick. The class follows what is alleged, not what you believe.
A goes in the as 'quality' because the guest was nice about it. No one looks at the batch, and it keeps going out through dinner.
Illness, allergic , , contamination and undercooked food are food safety until shown otherwise. A wrong meal caught at the pass is a , and it deserves the same attention.