Complaint Letter Format

[Point.Blank]

Please help me with the most recent and widely accepted format/skeleton for a complaint letter:

Your Address

Date

Inside Address/To the concerned authority it's being addressed

Subject

Greetings/Opening Salutation,

Content/Body: 2-3 para

Thank you/Thanking you in anticipation

Yours Sincerely
Your Name


Please check on how the above format can be refined ?

Thanks

 

[Tdol]

It needs a bit of refining, so that the complaint is the Subject, and the thanking includes the expected result of the complaint.