Are Image Seals Legally Valid?

A supplier emails a purchase agreement and asks you to "sign, stamp, and send back a scan." You do not have the physical company stamp with you, but you do have a PNG of it. Five seconds in a PDF editor and the document looks exactly as if it had been stamped. Is that legally the same thing?

The honest answer is more useful than a flat yes or no. A seal image does not, by itself, create legal effect. But a document is not automatically invalid because its seal is a picture either. What matters is what the document needs to prove, who put the seal there, and whether the law or the recipient requires a particular form.

This article is general information, not legal advice. Rules differ by country, by document type, and by the agreement between the parties. For anything with real consequences, ask a lawyer qualified where the document will be used.

What an image cannot prove

A seal exported as a PNG or SVG is a picture of a seal. It reproduces the appearance of an impression, but it carries none of the properties that make evidence strong:

• Who applied it. Anyone who has the file can place it on any document. Nothing in the image records whether it was the authorized person, a colleague, or someone who copied it from an old email.
• Whether the document changed afterward. The seal does not lock the text. Someone can edit the amount, the date, or a clause after the seal was added, and the seal will look exactly the same.
• When it was applied. There is no reliable timestamp and no audit trail.

A physical impression is not perfect evidence either, but it is at least tied to a specific object that someone controls. A cryptographic digital signature goes further: it is tied to a credential and breaks visibly if the document is altered. An image does neither. The electronic seal vs. electronic signature guide explains these differences in detail.

Why a document can still be valid

Here is the part that the "image seals are worthless" framing misses. In many legal systems, an ordinary commercial contract does not need a seal at all to be valid. The agreement is formed by the parties' consent, and the seal or signature is evidence of that consent. In the United States, the ESIGN Act and state laws based on the Uniform Electronic Transactions Act give electronic records and signatures the same standing as paper ones for most transactions. EU law, through the eIDAS Regulation, likewise says an electronic signature cannot be denied legal effect simply because it is electronic.

So when both parties have agreed to deal by email and the authorized person puts the company's seal image on a quotation or an order confirmation, that document will often be treated as what it appears to be. Not because the picture has legal power, but because there is other evidence: the email thread, the sender's address, the subsequent delivery and payment, and the fact that nobody disputes it.

The weakness only shows when something is disputed. Then the image proves very little, and everything depends on that other evidence.

Where image seals are commonly accepted

In practice, image seals are routinely used and accepted on:

• quotations, proforma invoices, and order confirmations exchanged by email;
• delivery notes, packing lists, and receiving documents;
• internal approvals, memos, and routing forms;
• letters of introduction, employment verification letters, and similar routine correspondence, where the recipient mainly wants to see who issued it;
• scanned copies, where the recipient knows the original exists and can ask for it.

"Commonly accepted" is a statement about practice, not a guarantee. A particular recipient can always ask for an original, a wet-ink signature, or a signed PDF instead.

Where an image is not enough

Some documents require a specific form that an image cannot satisfy:

• Registrations and filings with company registries, land registries, courts, or tax authorities, where a registered seal, a wet signature, or a qualified electronic signature may be required.
• Bank account opening and changes of signatory, where banks check against specimen seals or signatures held on file.
• Notarized or apostilled documents, which depend on a physical act in front of an official.
• Documents the law requires in a particular form, such as certain property transfers, guarantees, or powers of attorney in some jurisdictions.
• Anything the recipient explicitly asks to receive as an original or through a signing platform.

If you are not sure which category a document falls into, ask the recipient what they need before you send anything.

Authority matters more than the file

Whether a sealed document binds a company usually depends less on the seal than on authority: was the person who applied it entitled to commit the company to this? An image applied by the managing director, with the company's knowledge, on a document within their authority, is a very different thing from the same image applied by an employee who kept a copy after leaving.

That is why the most important control over a seal image is not the design; it is who has the file and how its use is recorded. The seal custody and control guide covers practical ways to keep track of it, and seals on contracts covers how seals and signatures work together on agreements.

The line you must not cross

Using a seal image without authority is where the real legal risk is. Creating or using a seal to impersonate an organization, to make a document look as if someone issued or approved it when they did not, or to deceive anyone into relying on it, can amount to forgery or fraud in most jurisdictions. That carries criminal as well as civil liability. Many countries have offenses that cover forged seals specifically, in addition to forged documents generally. That a seal was made with a free online tool is not a defense, and neither is the claim that it "was only an image."

This site exists to design and visualize seals. Using it to fabricate a counterfeit seal or a false document is misuse, without exception.

Lawful ways to use a seal image

There are plenty of legitimate uses, and most people who search for a seal generator have one of them in mind:

• Your own organization's documents, applied by someone authorized to do so, for routine correspondence the recipient accepts in that form.
• Design and branding work, such as prototyping a seal before ordering a physical one.
• Mockups, templates, and presentations that show what a stamped document will look like.
• Training and education, including teaching staff where a seal goes on each form.
• Personal and creative projects that do not mislead anyone about who issued a document.

When you need legal effect

If a document must hold up legally, use a process designed for that: an electronic signature platform that records identity and detects tampering, a qualified or certified electronic seal where the law provides for one, or the physical original. Many signing platforms let you upload a seal image as the visible appearance of a properly signed document, which gives you both the familiar look and actual evidence behind it. The rules differ by region; see the guides for China, Japan, Korea, and the United States.

The seal generator is built for designing seals and for the lawful uses above. Use it freely for those, and switch to a proper signing process the moment a document needs to carry legal weight.