Here’s a list of structures that can be used when expressing purpose in letter writing:

  • I am writing to inform you about…
  • I am writing to request…
  • The purpose of this letter is to…
  • I am contacting you to…
  • This is to notify you that…
  • I am reaching out to…
  • I would like to inform you that…
  • My reason for writing is to…
  • The aim of this letter is to…
  • I am writing in regard to…
  • I am writing with the intention of…
  • This letter is to request…
  • I am writing on behalf of…
  • I would like to bring to your attention…
  • I am writing to follow up on…
  • This letter serves to…
  • I am writing in connection with…
  • I wish to inform you that…
  • The intention of this letter is to…
  • I am writing to provide you with…