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. 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? You can say "Thank you for that counter-offer, but I've decided to accept the other company's offer. Negotiating and writing counter offer letters can feel stressful. Here's a guide to getting the best results while countering a job offer.