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100 Sentence Starters for Complaint Letters

September 7, 2026

100 Sentence Starters for Complaint Letters

No. Item Definition
1. A serious issue has arisen Introduces a significant problem
2. As a result of this issue Links to the problem’s effects
3. At the time of writing Sets the current situation
4. At this point, I must object Signals formal objection now
5. Despite previous contact Shows earlier attempts were made
6. Due to the poor service Gives the reason for complaint
7. Even after repeated requests Shows requests were ignored
8. For this reason, I am upset Explains dissatisfaction clearly
9. Given the circumstances Introduces the complaint context
10. Having received no response Notes lack of reply
11. I am concerned about Raises a concern
12. I am contacting you about Introduces the problem
13. I am disappointed with Expresses disappointment
14. I am dissatisfied with States dissatisfaction directly
15. I am writing about Begins a complaint clearly
16. I am writing after Links complaint to event
17. I am writing again about Repeated complaint opener
18. I am writing as a client Identifies business relationship
19. I am writing as a customer Identifies role in complaint
20. I am writing as a parent Identifies family role
21. I am writing as a passenger Identifies travel role
22. I am writing as a patient Identifies medical role
23. I am writing as a resident Identifies local role
24. I am writing as a tenant Identifies housing role
25. I am writing because Simple reason opener
26. I am writing concerning Formal issue introduction
27. I am writing despite Signals frustration or contrast
28. I am writing due to States cause briefly
29. I am writing following Refers to recent incident
30. I am writing further to Continues earlier complaint
31. I am writing in connection with Links letter to issue
32. I am writing in light of Refers to recent circumstances
33. I am writing in relation to Connects letter to issue
34. I am writing in response to Replies to earlier message
35. I am writing on behalf of Represents another person
36. I am writing once again Shows repeated contact
37. I am writing over Introduces subject informally
38. I am writing regarding Introduces the issue formally
39. I am writing to advise you Informs recipient of issue
40. I am writing to alert you to Warns about a problem
41. I am writing to ask for General request opener
42. I am writing to ask how Seeks explanation or fix
43. I am writing to ask whether Requests clarification
44. I am writing to ask why Questions the problem
45. I am writing to bring to light Reveals a problem
46. I am writing to challenge Disputes a decision or action
47. I am writing to clarify Seeks or gives clarification
48. I am writing to complain Formal opening for a complaint
49. I am writing to contest Formally disputes something
50. I am writing to dispute Contests a charge or claim
51. I am writing to express concern Formal concern statement
52. I am writing to follow up on Continues unresolved issue
53. I am writing to highlight Emphasizes the problem
54. I am writing to inform you of Gives notice of issue
55. I am writing to inquire about Asks about an issue
56. I am writing to let you know Informal complaint opener
57. I am writing to make a complaint Explicit complaint statement
58. I am writing to notify you Gives formal notice
59. I am writing to object to States objection clearly
60. I am writing to point out Introduces a specific issue
61. I am writing to protest Strong complaint opening
62. I am writing to question Challenges something directly
63. I am writing to raise a concern Formal concern opener
64. I am writing to raise an issue Introduces a problem
65. I am writing to remind you References earlier contact
66. I am writing to report Introduces a problem report
67. I am writing to request a refund Asks for money back
68. I am writing to request action Asks for action
69. I am writing to say that Simple complaint opener
70. I am writing to seek redress Requests remedy formally
71. I am writing to update you on Gives complaint progress
72. I am writing to voice my concern Expresses concern directly
73. I am writing with reference to Refers to a specific matter
74. I feel compelled to write Shows strong reason to complain
75. I must bring to your attention Highlights a serious issue
76. I regret to inform you Signals dissatisfaction formally
77. I was unhappy with Describes negative experience
78. I wish to express my concern States concern politely
79. I would like to complain Direct complaint opening
80. Much to my frustration Shows personal frustration
81. My complaint concerns Introduces the complaint topic
82. Needless to say, I am upset Emphasizes obvious dissatisfaction
83. No action has been taken States nothing was done
84. On this occasion, I must say Introduces a formal complaint point
85. Our experience has been poor Describes unsatisfactory experience
86. Please be advised that Introduces important complaint information
87. Please note that Draws attention to a point
88. Regrettably, this has continued Notes the problem persists
89. So far, this remains unresolved States issue is still open
90. Such treatment is unacceptable Condemns the treatment received
91. The matter remains unresolved States the issue continues
92. The service I received was poor Complains about bad service
93. This has caused inconvenience States negative impact briefly
94. This issue needs attention Calls for action
95. This matter is very concerning Expresses serious concern
96. To my disappointment Introduces dissatisfaction politely
97. Under these circumstances Frames the complaint situation
98. Unfortunately, I must report Introduces bad news formally
99. We are extremely dissatisfied States strong dissatisfaction
100. Your handling of this matter Introduces criticism of response

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