A counter offer letter is a physical letter or email candidates send to an employer when they want to negotiate the terms of a job offer given to them. State your counteroffer: In the body of the letter, clearly state the company's offer and your counteroffer and why you think it is justified.An example of an acceptance letter is: Dear Ms. Anderson,. I'm writing in response to your requested salary upgrade. How to Write a Counter Offer Letter. Learn how to write a professional job offer letter acceptance mail reply with joining date with an easy format and practical samples. I appreciate the time and effort you have taken to consider my requests and negotiate the offer. Struggling to write a counter offer letter? In writing: Fill out a complaint form or write a letter and send it to: Alameda Alliance for Health. ATTN: Grievance and Appeals Department.