It's late October. For Oklahoma business owners, that means the books are getting their year-end once-over, and someone is staring at an unpaid invoice from a deal sealed with a handshake and a cheerful “don't worry, I'm good for it.” This is the time of year our phones start ringing with the same question: can I actually sue over a promise nobody wrote down? Very often, the answer is yes. Turning a broken handshake into a claim you can recover on is a big part of what our business dispute attorneys do every day.

Oklahoma is a handshake state at heart, and its law reflects that. Under 15 O.S. §134, all contracts may be oral unless a specific statute requires them to be in writing. The contractor who agreed to finish your build-out by Thanksgiving, the supplier who promised a locked-in price, the partner who said “we'll split it 50/50”: those can all be binding agreements. At Brown & Flesch, we start by showing clients that the absence of paperwork is rarely the end of the story.

The Oklahoma Supreme Court has said a breach of contract claim needs three things: a contract was formed, it was breached, and you suffered actual damages because of it (Digital Design Group, Inc. v. Information Builders, Inc., 2001 OK 21). Notice what's missing from that list: a notary, a letterhead, and a 40-page PDF. Our job is to build each of those three elements out of evidence you probably already have and didn't realize mattered.

Of course, “you can sue” and “you can win” are two different sentences. Verbal agreements create a he-said-she-said problem, and the other side knows it. That's why we treat every handshake case like a reconstruction project. We gather the timeline, the paper trail, and the witnesses before the other party's memory gets conveniently foggy.

We also believe court should be the last stop, not the first. Most verbal-agreement disputes we handle are resolved through a well-documented demand letter, negotiation, or mediation. Filing suit comes only when the other side refuses to do the right thing. That approach protects your money, your time, and, in a lot of small Oklahoma markets, a business relationship you may still need.

Which Agreements Have to Be in Writing in Oklahoma?

Here's the catch. Oklahoma's statute of frauds, found at 15 O.S. §136, carves out certain deals that generally can't be enforced unless they're in writing and signed by the party you're trying to hold to them. The big ones for business owners are:

• Agreements that, by their own terms, can't be performed within one year
• A promise to pay someone else's debt (think personal guarantees)
• Sales of real property, or any interest in it
• Leases of real property longer than one year
• Agreements authorizing an agent or broker to buy or sell real estate for a commission

Separately, Oklahoma's version of the Uniform Commercial Code generally requires a writing for the sale of goods priced at $500 or more.

If your deal falls into one of these buckets, don't panic. Courts recognize exceptions like part performance, and “writing” is broader than most people think. Oklahoma's Uniform Electronic Transactions Act treats electronic records and signatures as satisfying writing requirements. That confirming email or detailed text thread may carry more weight than you'd expect. Spotting which exception fits your facts is exactly where experienced counsel earns its keep.

How Do You Prove a Contract That Was Never Written Down?

Nobody writes a contract on a napkin anymore. They write it in a group text. In our experience, the “unwritten” contract almost always left fingerprints. Common evidence includes:

• Texts and emails confirming price, scope, or deadlines (“Sounds good, see you Monday” is surprisingly powerful)
• Invoices, estimates, and receipts showing what was agreed and billed
• Partial payments, including payment-app memos that say what the money was for
• Course of dealing, such as six months of the same order at the same price
• Witnesses who heard the terms or watched the work happen

Oklahoma law also recognizes implied contracts, whose existence and terms are shown by the parties' conduct rather than their words (15 O.S. §133). If someone accepted your work, used your product, and kept the benefit, the law often won't let them pretend there was no deal at all.

How Long Do I Have to Sue Over a Broken Verbal Agreement?

This is where the year-end calendar gets serious. Under 12 O.S. §95, you generally have three years to sue on a contract that isn't in writing, compared with five years for a written contract. That two-year gap is one of the hidden costs of the handshake.

Here's a practical example. If a customer stopped paying on a verbal deal back in the fall of 2023, your window may be closing right about now. One wrinkle can work in your favor: under 12 O.S. §101, a partial payment or a written acknowledgment of the debt can restart the clock on a contract claim. Before you write off an old receivable, have our Oklahoma business litigation team check whether the deadline has really passed.

What Can You Actually Recover?

Contract damages are about making you whole, not about punishing the other side. Under 23 O.S. §21, the measure of damages is the amount that compensates you for the harm the breach caused, or that would naturally be likely to result from it. The statute also requires those damages to be clearly ascertainable in both their nature and origin. Translation: “I lost a fortune” won't cut it, but “here are the invoices, here's the replacement vendor's higher quote, and here's the difference” will.

There's also a ceiling. Under 23 O.S. §96, you generally can't recover more than you would have gained if both sides had fully performed. So the goal isn't a windfall; it's getting the benefit of the bargain you were promised. Building a damages number that is specific, documented, and defensible is often what moves a stubborn opponent to the settlement table.

Should You Put Future Deals in Writing?

Yes, and we say that with love for the handshake. A one-page written agreement covering price, scope, deadlines, and what happens if something goes wrong gives you a five-year window instead of three. It also avoids most statute-of-frauds fights and turns a future dispute from a memory contest into a document review. Once a deal is in writing, Oklahoma law generally treats that writing as superseding the earlier oral negotiations. That's one more reason to make sure the paper actually says what you agreed to.

Broken Handshake? We've Got a Solution.

Our motto is simple: You got problems, we got solutions. A broken verbal agreement is a problem, but it's usually a solvable one. George Brown, Dane Flesch, and our team know Oklahoma contract law inside and out. We'll tell you plainly whether your handshake deal is enforceable, how much time you have left on the clock, and what it will realistically take to get paid. If someone in your business world isn't keeping their word, talk to our business disputes team before the year, and possibly your deadline, runs out.