In a typical home sale, you sign a purchase agreement in real estate at two distinct moments: the buyer signs first to turn an offer into a formal proposal, and the seller signs afterward to accept it. The contract only becomes binding once both parties have signed the same version and a copy has been delivered back to the other side. Between those two signatures, nothing is final.
The Buyer Signs First
The process starts when the buyer signs an offer to purchase and submits it to the seller. That signed document spells out the price, the proposed earnest money deposit (typically 1% to 3% of the purchase price), the target closing date, and any contingencies for inspection or financing. The buyer’s signature by itself does not create a contract. It creates a proposal the seller can accept, reject, or counter.
The earnest money deposit usually travels with the signed offer and goes into an escrow account held by a neutral third party, such as a title company, a brokerage, or a real estate attorney. The deposit sits there until closing or until the deal falls apart. It is a financial gesture of good faith, showing the seller the buyer has real money at stake.
A buyer who changes their mind at this stage can still walk. Until the seller signs and communicates acceptance, the buyer can withdraw the offer with no legal consequences. The standard approach is a call from the buyer’s agent to the seller’s agent, followed promptly in writing. No contract exists yet, so there is nothing to breach. The reason does not matter.
The Seller Signs Next: Accept, Reject, or Counter
Sellers rarely accept a first offer without changes. A higher price, a later closing date, fewer repair obligations, a shorter inspection window: any alteration turns the seller’s response into a counteroffer. The moment the seller changes even one term, the buyer’s original offer is legally dead. The counteroffer is a new proposal, and the seller signs or initials the revised terms before sending it back.
The buyer then faces the same three choices: accept, reject, or counter again. Each new counteroffer kills the previous version, so only the most recent document matters. This cycle repeats until both parties agree on every term and sign the same version, or until someone walks away. The signatures stack up on multiple drafts, but only one draft ever becomes the contract.
When Signing Actually Creates a Binding Contract
The purchase agreement becomes enforceable the moment the last party signs and delivers a copy to the other side. That delivery date is called the effective date, and it starts the clock on every deadline in the contract: inspection windows, financing contingencies, and the closing date itself. Without delivery, a signature sitting in someone’s desk drawer does not bind anyone.
Timing matters here more than people realize. If a buyer calls to revoke at 2 p.m. but the seller already signed and emailed back the accepted offer at 1:45 p.m., the buyer is likely bound. The window to back out without consequence closes at the exact moment acceptance is communicated.
Under the Statute of Frauds, recognized across all 50 states, a contract for the sale of real estate must be in writing and signed by the parties to be enforceable. A handshake deal or verbal promise to buy a house, no matter how specific, will not hold up in court. The writing also needs to identify the property, the price, and the essential terms with enough clarity that a court could enforce them. Vague descriptions have voided otherwise valid agreements.
Who Needs to Sign Besides the Buyer and Seller
The obvious signers are the buyer and seller named on the offer. The real list is often longer, and discovering a missing signature late in the process can derail a closing.
If the seller is married, the spouse frequently needs to sign even if their name is not on the title. Roughly two-thirds of states have homestead or community property laws requiring both spouses to sign any document transferring an interest in the marital home. In some of those states, a conveyance signed by only one spouse is completely void, not just voidable, but void from the start, as if it never happened. Verifying marital status early is standard practice.
When a business entity like an LLC owns the property, the person signing must have documented authority. An operating agreement typically names who can act on the LLC’s behalf. If the property being sold is the LLC’s only significant asset, the transaction may fall outside the ordinary course of business, and all members may need to sign rather than just one authorized manager. Asking for a copy of the operating agreement before accepting an LLC’s signature is standard practice and saves everyone trouble later.
Attorney Review Windows in Some States
A handful of states, concentrated in the Northeast, build an attorney review period into the signing process. After both parties sign, their lawyers get a short window, typically three business days, to review the contract. During this period, either attorney can disapprove the contract for any reason, effectively canceling it without financial penalty to either side. Attorneys can also propose amendments or renegotiate unfavorable provisions.
Where attorney review applies, the signatures on the purchase agreement do not make the deal truly final until the window closes without objection. Experienced agents in those states treat a freshly signed contract as tentative until the deadline passes. Whether this provision applies depends entirely on local practice and state law.
Signing Electronically vs. In Person
Most residential transactions today are signed on platforms like DocuSign or Dotloop rather than across a kitchen table. Federal law under the ESIGN Act establishes that a signature or contract cannot be denied legal effect solely because it is in electronic form.1Office of the Law Revision Counsel. 15 USC 7001 – General Rule of Validity Forty-nine states and the District of Columbia have also adopted the Uniform Electronic Transactions Act, which reinforces the same principle at the state level. New York has not adopted UETA but has its own electronic signature laws that reach the same result.
Clicking “sign” on a screen carries the same legal weight as ink on paper. The platform creates a record of who signed, when, and from what device, which actually makes it harder to dispute than a traditional wet signature. For the signing to be valid, all parties must consent to conducting the transaction electronically. No one can be forced into a digital process against their will.2National Credit Union Administration. Electronic Signatures in Global and National Commerce Act (E-Sign Act)
What You Commit to When You Sign
Signing the purchase agreement does not mean the deal is done, but it does lock both parties into a defined set of obligations and deadlines. The contract opens a contingency period during which the buyer can typically cancel for specific reasons: a failed inspection, denied financing, or a low appraisal. Each contingency has its own deadline and its own removal process. Missing one of those deadlines is one of the most common ways buyers accidentally lose their leverage.
Backing out after the contingency windows close has real consequences. The most immediate risk is losing the earnest money deposit, which many contracts designate as liquidated damages the seller keeps if the buyer defaults. Beyond the deposit, the non-breaching party can sometimes pursue specific performance, a court order forcing the other side to complete the sale. Courts grant this remedy in real estate more readily than in other contract disputes because every property is considered legally unique.
Canceling through a valid contingency is exercising a contractual right. Canceling without one is a breach. The signature is what draws that line.
Signing the Purchase Agreement Is Not the Same as Signing at Closing
The purchase agreement signing and the closing are two different events, often separated by 30 to 60 days. At closing, both parties sign a fresh round of documents to actually transfer ownership. The buyer signs the mortgage note promising to repay the loan, the deed of trust giving the lender a security interest in the property, and the closing disclosure detailing every dollar changing hands. The seller signs the deed transferring title to the buyer.
Purchase agreements themselves almost never require notarization. The deed signed at closing does, because it gets recorded with the county. The purchase agreement is a private contract between buyer and seller, and the signatures of the parties are what make it enforceable, not a notary’s stamp. The deed, by contrast, announces the ownership change to the world, which is why the formalities differ.