The answer depends on whether the agreement satisfies the Statute of Frauds. An attorney can answer your question after a formal review of your agreement.
You would be well-served to discuss your dilemma with a New York business law attorney in a confidential forum as soon as possible.
If a written agreement is not signed, it is not valid. You can't just have one party sign and not the other required party and then also expect that you can demand compliance with what was not signed. This person cannot also just wait years and then,, when it is right for them, then sign and claim that the other party is bound to the terms. An agreement must be accepted in a reasonable time or in the time required in the contract.
As noted by my colleague, speak with a local business attorney immediately to stop these games.
This answer is for informational purposes only and is not legal advice regarding your question and does not establish an attorney-client relationship.
As noted a contract is not binding unless signed by all parties. You should consult with a business lawyer.
This e-mail may contain confidential or privileged information. If you are not the intended recipient, please notify the sender immediately by return e-mail and delete this e-mail and all copies and attachments. If you are not the intended recipient, or the employee or agent responsible for delivering the message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. IRS Circular 230 Notice: Unless specifically stated otherwise, any tax advice contained in this communication (including any attachments) is not intended or written to be used, and cannot be used, for the purpose of (i) avoiding penalties under the Internal Revenue Code or (ii) promoting, marketing or recommending to another party any transaction or matter addressed herein. Unless specifically stated otherwise, this communication shall not be deemed to be legal or tax advice, and no attorney-client relationship shall be deemed to have been created.
Your situation is not entirely understood here.
Further, it is possible to demonstrate assent to the agreement in other ways than just signing physically on the document. For example, if you had an email acknowledgement "got that agreement you sent Bill, everything looks great" this may be enough to prevent the other party from later claiming they never assented.
The facts and circumstances really depend. I would advise discussing with a lawyer in private. The good news is that most of us here, including myself, offer a free phone consult.
New York, NY
The law firm of Natoli-Lapin, LLC (Home of Lantern Legal Services) offers our flat-rate legal services in the areas of business law and intellectual property to entrepreneurs, small-to-medium size businesses, independent inventors and artists across the nation and abroad. Feel free to call for a free phone consultation; your inquiries are always welcome: CONTACT: 866-871-8655 Support@LanternLegal.com DISCLAIMER: this is not intended to be specific legal advice and should not be relied upon as such. No attorney-client relationship is formed on the basis of this posting.