Elements of a Letter Letter Formats Effective Letter Writing Unit 1 Love Letters Unit 2 Letters to Families and Friends Unit 3 Letters to Neighbors Unit 4 Thank.You Letters Unit 5 Letters of Congratulations Unit 6 Letters of Invitations Unit 7 Letters of Acceptances Unit 8 Letters of Refusals Unit 9 Letters of Apologies Unit 10 Letters of Responses Unit 11 Wedding Correspondence Unit 12 Letters of Sympathy Unit 13 Appointments and Interviews Unit 14 Letters of Disagreement Unit 15 Acknowledgments and Confirmations Unit 16 Anniversaries and Birthdays Unit 17 Letters of Announcements Unit 18 Goodwill Letters Unit 19 Holiday Letters Unit 20 "Get-Well" Letters Unit 21 Sensitive Letters Unit 22 Letters of Advice Unit 23 Letters of Travel Unit 24 Letters to Organizations-and Clubs Unit 25 Belated Letters Unit 26 E-mail