From Teflpedia

A valediction (/vælədɪkʃən/) is an expression used to say farewell, especially a word or phrase used to end a letter or message, or the act of saying parting words whether brief or extensive.[1]. They vary extensively according to register.

  • Spoken valedictions: "Bye!" "See you!" "toodaloo", "cheers!"
  • Written valedictions: "yours sincerely", "yours faithfully", etc.

Let's make a list.

Compare salutation.