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.Learn what a counter offer letter is, common responses to one and which elements to include in your response to candidates. How to Write a Counter Offer Letter. You can say "Thank you for that counter-offer, but I've decided to accept the other company's offer. I hope this message finds you well. In each paragraph, clearly state the original offer, your counteroffer, and why you believe the counteroffer is appropriate. Struggling to write a counter offer letter? I received a job offer on Monday night. Your acceptance of the offer.