Timely and complete notice of acceptance when all parties have reached agreement. Know When Contract is Binding.Yes, so long as the withdrawal happens before the party to whom the offer or counteroffer has been made signs or initials it and communicates their acceptance. How do I fill out the Counter Offer Form? The Effective Date of the contract is the "date that: (1) the last one of Buyer and Seller has signed or initialed this offer or the final counteroffer, if any. This is a tutorial all about counter offers. There are three different counter offers that we're going to take a look at and I'm going to talk you through them. During a real estate negotiation, the seller made a verbal counter offer that was accepted approximately three weeks. The counter offer should always end with a section for signatures so that if it is accepted, it can be signed immediately. If you receive a counter-offer, details and timelines for acceptance will be outlined in the letter from the OIC Unit.