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. Learn what a counter offer letter is, common responses to one and which elements to include in your response to candidates.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. 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. Knowing how to accept a job offer is key. Thank the recruiter, review the offer and follow up with questions and a counter offer before accepting the offer. In each paragraph, clearly state the original offer, your counteroffer, and why you believe the counteroffer is appropriate. This Project, undertaken at the request of Mayor Jane.