officialwarning

noun
UK /əˈfɪʃəl ˈwɔːnɪŋ/
US /əˈfɪʃəl ˈwɔːrnɪŋ/

A serious message from someone in charge that tells you to stop doing something or fix a problem.

The school sent an official warning to parents about the broken gate.


OTHER MEANINGS

2. A written statement from a government or company saying that rules were broken.

The factory received an official warning after breaking safety rules.

3. A public message that tells people about a possible danger.

The weather service issued an official warning about the storm.

4. A final notice before a punishment is given.

He got an official warning for being late to work three times.