1) Ad hoc 2) As in this document 3) As part of this document 4) Attachment adverb 5) Attachment word 6) Contract adverb 7) Contract word 8) Contractual adverb 9) From - Eternity link 10) In this matter 11) On this 12) Preposition seen in contracts 13) Regarding this 14) Regarding this matter 15) Regarding this point Found on https://www.crosswordclues.com/clue/hereto