goodbyenote
nounUK /ˌɡʊdˈbaɪ nəʊt/
US /ˌɡʊdˈbaɪ noʊt/
A goodbyenote is a short message you leave for someone when you are going away.
She left a goodbyenote on the kitchen table before catching her train.
OTHER MEANINGS
2. A brief written message left by a guest or visitor before leaving a place.
The visitor left a goodbyenote thanking the family for their hospitality.
3. A final message written by someone ending a relationship or job.
He handed in his badge with a short goodbyenote to his manager.
4. A note placed beside a departing gift or item to explain its purpose.
A goodbyenote was tucked inside the box of borrowed books.