How To Write A Complaint Letter Regarding Noise . And it is available for free download. Your reason for writing a complaint letter. Pin by AllBusinessTemplates on community Complaint letter, Lettering from www.pinterest.com Applying for a noise order. Use a simple, professional, complimentary close, such as sincerely or regards. I write this letter in order to bring to your kind concern about the noise pollution that we are facing for a long time.