OmniDocHow to seal an electronic contract: Placement of electronic official seal and seam seal
Explain how to place seals and seam seals in electronic contract PDF, including first selecting the right seal type, preparing transparent pictures, aligning and checking page by page, and explaining the difference between picture seals and certified electronic signatures.
Key points of this article
- The seal image should use a transparent background to prevent the white background from covering the contract text, amount and signature fields.
- For seam seals, the seal image needs to be cut into equal parts according to the number of pages. One piece should be placed on each page, and the edges of adjacent pages must be aligned to be complete.
- The picture seal is only a visual mark and does not equal a reliable electronic signature; if there are legal requirements, consult legal counsel and use certified services.
- Confirm the final version before stamping. If you change the content after stamping, the seal and text will not match.
- After finishing, check the position of the seal page by page, whether the text is blocked, whether the seam is continuous, and compare it with the final version.
When signing an electronic contract, many people are accustomed to paper contracts. They want to find the "seal" position on the PDF, put the company seal at the signature, and leave a seam seal on the edge of the page. The problem is that the seal of an electronic contract is a picture or a signature record. If it is misplaced, the text is covered, or only one page is stamped, problems may arise during verification of the contract.
This article is written for individuals and small teams who need to complete stamping on PDF contracts, including financial, administrative, business staff, and people who draft contracts themselves. After reading, you will be able to judge which seal should be used, know how to place the electronic official seal and seam seal in the PDF, and check page by page before delivery.
Here is how to place the seal. The practice of handwritten or hand-drawn signatures is outside the scope of this article.
How to stamp an electronic contract? One sentence conclusion
First answer in one sentence: for ordinary internal confirmation or a contract recognized by both parties, a seal image can be placed at the signature position of the PDF; when a legally verifiable electronic signature is required, a certified service should be used instead of just placing a picture.
| your situation | Recommended practices | reason |
|---|---|---|
| Internal confirmation or a general contract recognized by both parties, only the company name and date need to be signed. | Place a picture of the seal at the signature location and check the signature | Simple operation, suitable for scenarios that do not require third-party authentication |
| The contract has many pages and needs to be stamped to prevent pages from being changed. | Cut the seal image into equal parts according to the number of pages and place them page by page | The seam seal requires that each page be imprinted, and stamping only one page will not be effective. |
| The contract amount is large and involves the risk of disputes, and the other party requires a verifiable electronic signature. | Use an electronic signature service with a certificate and consult with legal counsel | The picture itself cannot prove the identity of the signer, nor can it indicate whether the document has been altered after signing. |
| The other party is not around and needs to sign or stamp online | Initiate a signing request for the PDF and the other party will complete it online | Reduce mailing and version confusion, and make signature records clearer |
Before you start: Confirm these points first
- Whether the contract has been finalized. If you correct the text after stamping, the seal and text will no longer correspond, and the other party may require a re-signing. Confirm the number of pages, amount and terms before starting to stamp.
- Is the seal image available? Only use the seal pattern authorized by this organization. Seals of unknown origin or that do not belong to the unit should not be used in contracts.
- Page number and location that need to be stamped. List the signature page, footer of each page and seam position. When there are many pages, writing them clearly in advance can reduce missed pages.
- Format requirements of the other party or internal system. Some units stipulate the color, size or location of the official seal. A seal drawing should be prepared as required first.
- Validity requirements of the contract. The "Electronic Signature Law" stipulates that a reliable electronic signature has the same legal effect as a handwritten signature or seal. Reliability depends on conditions such as signature production data, certificates and timestamps, which are not automatically met by images of seals.
Steps to Stamp a PDF Contract in OmniDoc Desktop Client
- Prepare the seal picture. Save the seal with a transparent background to avoid the white background covering the main text of the contract. The edges of the image should be clear and the color should be consistent with the original seal.
- Open the finalized contract PDF. Open the file in a desktop client, enter the PDF editor, and confirm that the number of pages and content are consistent with the final version.
- Use the signature function to place the seal. Add the seal image in the signature function of the editor and place it near the name of the signer on the signature page. If the function does not support importing pictures, you can skip to step 6 and use the method of placing pictures one by one instead.
- Resize and avoid the main text. The seal should cover the signature line but should not cover the amount, date or terms text. If the seal is too small, it can be enlarged appropriately, but it should not exceed the edge of the page.
- Check whether multiple stamps are required. Some contracts require a stamp at the footer of each page, or a stamp on attachment pages. Confirm page by page according to the contract requirements, do not just cover the first page.
- Create the seal fragments of the riding seal. If the contract has N pages, cut the seal picture into N equal parts into small pictures. Each piece corresponds to one page, and the cutting lines should be horizontally and vertically to ensure completeness during splicing.
- Place the seam seal fragments page by page. Place each piece on the edge of the corresponding page so that the pieces on adjacent pages are connected end to end when the page is turned. The seam position should be kept within the page margin to avoid being cut.
- Save as new file. Save as a new PDF, indicate the version and date in the file name, and keep the final version as a reference.
Check each item after completion
| Check items | How to see it | What to do if there is a problem |
|---|---|---|
| Signing location | Open the signature page and confirm that the seal is near the signatory's name | If the position shifts, return to the editor to replace |
| Whether text is obscured | Zoom in to view the signature section, amount, and date | Shrink the stamp or move it to a blank space, without overwriting the main text |
| Cross-seam stamp continuity | Flip through page by page, or compare adjacent page edges side by side | If discontinuous, cut again in equal parts and place them page by page |
| Each page must be stamped | Check the sealed terms of the contract page by page | Cover any missing pages and re-export them |
| Can the file be opened normally? | Open it with another reader and check the image display | Re-export the PDF if the stamp is not displayed |
| Whether the content has been changed | Compare two PDFs with the final version using the comparison function | If you notice changes, first confirm the reasons and sign again if necessary |
If the contract is a scanned copy, you can first try selecting a paragraph of text in the PDF. If the selection is incorrect, it means the page is an image. Scanned copies can still be uploaded directly for processing; when verifying, you should carefully check whether the seal matches the original.
📊 Core Comparison
There are three common practices in practice, mainly distinguished by verifiability and process costs:
| Method | Suitable for the scene | Limitations |
|---|---|---|
| Seal image | Internal confirmation and general business contracts are simple to create and place | It can show the intent to stamp, but cannot independently prove the signing identity, nor can it guarantee that the document has not been modified after signing |
| Electronic seals with authentication | Contracts requiring long-term verification and high risk of disputes | Costs and procedures are heavier, so legal opinions should prevail |
| Handwritten signature scan | Confirmation letter or transition phase | The verification issue is similar to that of picture seals and should not replace formal electronic signatures |
❓ Frequently Asked Questions (FAQ)
1. What does it mean to have an electronic contract stamped with a cross-section seal?
A cross-seam stamp refers to a stamp spanning the edge of adjacent pages, allowing the print to form a complete pattern when flipping pages, which helps prevent page replacement. In PDFs, the usual approach is to cut the stamp image into equal parts, placing one sheet per page.
2. What is the difference between an electronic official seal and an electronic signature?
An electronic official seal is a record of the design or signature of the seal, mainly indicating the intent of the organization to stamp it. An electronic signature is a technical means used to identify the signer and confirm content, with legal validity depending on whether reliability conditions are met. The two are often used together, but not simply equated.
3. What is the difference between image stamps and electronic stamps with authentication?
A picture stamp is just a picture; anyone can copy it. Authenticated electronic signatures associate certificates with signature records, facilitating later verification of signers and documents for modification. For large or disputed contracts, the latter should be chosen.
4. Can a scanned contract be directly stamped with an electronic seal?
You can first upload a PDF for processing, then place the seal and cross-stamp in the same way. Text on scans is not selectable, so verification relies more on visual inspection and page by page with the original.
📝 Summary
The key to stamping an electronic contract is to first confirm the final version, then select the correct seal type, and finally verify the signature, stamp, and text page by page to see if the seal is obscured. Ordinary contracts can be completed with a seal image, while important contracts should be handled by consulting legal counsel and using electronic signatures with authentication.
