From sale and lease contracts to unit reservations and handover reports, Wthaiq gives developers, brokers and property managers one place to complete deals remotely. Have multiple parties sign with verified identity that closes the door on impersonation, and keep every contract in long-term archiving that stays verifiable decades after signing.
In real estate, huge sums turn on a single signature. The buyer is in one city, the owner in another, the broker in between. And the paper contract stays exposed to forgery, damage and loss. Any challenge to a party's identity or to the authenticity of an old copy can bring down an entire deal years after it closed. Secure, authenticated signing is no longer a luxury; it protects the asset itself.
With every high-value deal, the risk grows that someone signs in the name of the real owner or buyer. A paper or unverified signature leaves a wide opening for challenge and impersonation in the most valuable contracts of all.
Getting the buyer, the owner and the broker into one place for a paper signature is hard. Delaying the reservation or the handover record by days to schedule meetings cools the deal down and opens the door to a withdrawal or a higher bid from someone else.
The legal standing of a sale or tenancy contract does not end when it is signed; you may be asked to prove it ten years later or more, before an official body. Paper archives decay and get lost, and ordinary computer files lose their verifiability over time.
Ready-made templates, signing with identity verification, and authenticated archiving — for every type of document the sale and lease cycle needs, from start to finish.
Start from a watertight property sale template or upload your own contract, then ask each party to sign with verified identity and close the door on disputes over the most valuable clause in the deal.
Sale contractLandlord and tenant sign remotely in an orderly sequence, with renewal alerts before the term ends. No paper appointments and no conflicting copies — just one authenticated contract whose status everyone can see in real time.
Lease contractLock in the client's intent immediately with a quick reservation form signed from a phone in minutes, issued with a completion certificate. You hold the unit before the interest cools or a competitor steps in.
Reservation formDocument your relationship with the client and the owner through a brokerage agreement with a clear commission, signed with a verified identity. It protects your right to that commission from any later denial once the deal is done.
Brokerage agreementRecord the condition of the unit at handover in a report signed remotely by both parties. You end up with authenticated evidence bearing a fixed date that settles any later disagreement about what the tenant or buyer received.
Receipt recordEvery completed contract gets a number and a QR code for public verification of its validity, and is kept in long-term archiving whose legal standing survives decades — with no need for your original files.
A public verification pageStart from a ready sale, lease or reservation template, or upload your contract as a PDF and drag signature fields onto it.
Set the owner, the buyer and the broker, and order the signing sequence so that no party signs before the one ahead of them.
Each signer opens their link on their phone, confirms their identity with an official document and a face match, then signs remotely.
The contract is closed with PAdES standing and a cryptographic fingerprint, then placed in long-term archiving with a completion certificate.
Give your parties the contract number and the QR code for public verification at any time, by anyone, without an account.
Before any party signs, they go through identity verification with an official government document and a live face match. In high-value deals in particular, this shuts the door on impersonation and denial and ties the signature to one specific, real person.
The owner, the buyer, the broker and the legal representative all sign — each from their own place and at their own time — in an orderly sequence that keeps the order intact. No need to gather everyone in one room, and no conflicting paper copies passed around.
A sale or lease contract may need to be proved twenty years later. Long-term archiving keeps the signature verifiable even after the original certificates have expired, so the contract stays legally binding for the lifetime of the asset itself rather than the lifetime of a passing file.
The contract is signed under the PAdES standard used for signing PDF files, with a cryptographic fingerprint embedded in the document itself. Any later change breaks the fingerprint immediately and becomes visible, so the final copy carries its own legal evidence inside it.
Every completed contract has a number and a QR code that open a public verification page showing its parties, its dates and the integrity of its signature. Any bank, authority or third party can confirm its validity in seconds, without coming back to you and without an account.
Yes. Signing is paired with confirming each party's identity through an official document and a live face match, then sealed with PAdES standing and a cryptographic fingerprint. When these layers come together, denying the signature becomes all but impossible. They are built precisely for high-value deals that leave no room for doubt about who signed.
No. Each party opens their own link straight from their phone browser, confirms their identity and signs, with no app to install and no account to create. That makes signing by distant parties fast and smooth, and cuts the timeline from weeks of scheduling meetings to minutes.
Because property is an asset that lasts for decades, and proof of its contract may be demanded many years later before an official body or in a dispute. Long-term archiving preserves the ability to verify the signature even after the original certificates have expired. So the contract does not lose its legal standing over time the way ordinary files do.
Every completed contract has a number and a QR code that open a public verification page showing its parties, its signing dates and the integrity of its fingerprint. Any bank, authority or later buyer can confirm the contract is genuine in seconds, from anywhere. No need for your original file, and no need to come back to you.
Yes. The system supports multi-party signing in an orderly sequence, so you set who signs first and who follows, and signing does not open for a party until the one before them has finished. This suits brokerage and commission agreements and sale contracts that bring more than one party into a single document.
Both. You can start from ready sale, lease and reservation templates, or upload your own contracts and records as PDFs and drag the signature fields onto them. Either way you get the same identity-verified signing, the same long-term archiving, and the same public verification page.
Create the sale or lease contract, sign it with verified identity alongside your parties remotely, and store it with archiving that keeps its legal standing binding for decades — all from one place.