Business correspondence

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Across
  1. 2. unwanted messages
  2. 4. a mention of something
  3. 8. suitable for a particular situation
  4. 9. an informal expression
  5. 10. a piece of writing
  6. 12. to add an excessive amount of something
  7. 13. your name written at the end of a document
Down
  1. 1. a person involved in a conversation
  2. 3. a set of symbols that divide written words
  3. 5. capital letters
  4. 6. an added document
  5. 7. a person who receives something
  6. 11. a sketch