OmniDocWhat is the use of adding signatures in PDFs? A common scenario is explained in this article
It explains several common uses of adding signatures in PDFs, including contract confirmation, form signatures, approval traces, and online signatures by the other party, explaining what signatures can and cannot prove, and how to operate in OmniDoc.
Key Points of This Article
- PDF signature is mainly used to indicate "I have seen, I confirm," making the confirmation process verifiable, commonly used in contracts, forms, and approvals.
- Scanned images of handwritten signatures, signatures added in PDF editors, and online signing requests vary in scenarios. Before choosing, check the other party's requirements.
- A signature only indicates that someone has confirmed a certain version, but does not guarantee the document is correct. Before signing, you should check the page number, amount, and date.
- After signing, keep the original and the signature version. If modifications are needed, regenerate a new version to avoid mixing multiple versions together.
- Scanned images cannot be directly edited; OCR is done first, then edited; OCR recognition results need to be checked item by item.
Many people receive a PDF and at the end are asked to "sign and send it back," instinctively printing it out by hand, then taking photos or scanning it. Some people need to send documents to others and want them to sign directly on their computers. The purpose of adding a PDF signature actually depends on what the document is addressing: whether to acknowledge the content, to leave a record for approval, or simply to complete the form.
This article is written for those who frequently handle contracts, application forms, approval forms, and internal procedures, as well as for those who are being asked to "sign on a PDF" for the first time. After reading this, you'll be able to distinguish several common scenarios, understand what a signature can do, which areas are easily misunderstood, and follow the steps to add signatures and send signature requests in OmniDoc.
What is the purpose of adding signatures to PDFs? In short, a conclusion
Simply put, the purpose of PDF signing is to have someone acknowledge a certain version of the file and to fix this action on the file. After signing, readers can see who it is, on which page, and which content has been identified. The specific effect depends on the local laws and agreements between both parties; the signature itself does not equate to a legal conclusion.
| Your situation | Recommended recipe | The reason |
|---|---|---|
| Contracts and agreements must be confirmed by both parties | Add your signature to the final PDF and keep the signed version | Signatures are bound to the specific version, making it easier to check later |
| If the other party isn't nearby, you need to sign remotely | Send a PDF through OmniDoc's signing request to have the other party sign online | No need to print or send back scans; the signing process is recorded |
| The registration and application forms must be completed and signed | First, fill out the form in the PDF, verify for accuracy, and then sign | Define the content before signing to avoid having to revise after signing |
| Internal approvals require confirmation from the person in charge | Sign the approval form and indicate the date and version in the file name or remarks | Clear approval opinions facilitate future traceability |
| He only signed occasionally, with no requirement for external performance | Just add your signature directly in the PDF editor | Simple operation, no need to go through the entire signing process |
What does the signature really prove?
The signature mainly proves three things: someone has read the document, this person is willing to confirm the content of this edition, and the time and location of the confirmation can be roughly checked. For a contract, signing usually means "I accept the contents of this page and previous terms", so read the key terms before signing instead of just looking at the last page.
What the signature cannot prove is that the content itself is correct. If the amount is miswritten, the date is wrong, or the attachment is missing, the signature will not automatically correct these problems. Before signing, you should check the page number, amount, date, names of both parties and attachment list against the draft or original materials.
difference between signature, Seal and handwritten signature
Many people mix signatures, seals and handwritten signatures. The concerns of the three are different: the handwritten signature emphasizes the handwriting, the seal emphasizes the seal of the unit or organization, and the signature on the PDF emphasizes the corresponding relationship between the document and the confirmation action. Which one is recognized in your scene should be based on the requirements of the other party.
If the other party explicitly asks for a "stamped version", then adding a signed picture on PDF may not meet the requirements, you need to ask the other party which form to accept first. On the other hand, if the other party only asks for "signature confirmation", there is no need to print, stamp or scan for the sake of form.
places easy to confuse
One is whether it can be changed after signing it. If the signed PDF is modified directly, the content does not correspond to the signature. The right thing to do is to generate a new version after modification, re-sign it, and keep the old version as a record.
The second is how to sign the scanned document . Most of the scanned PDF are pictures, so the text cannot be selected directly. You can use OCR to identify the text layer before editing or signing. The recognition results of OCR may have wrong words or missing words, especially numbers, names and technical terms, which need to be checked item by item, and the recognition results can not be trusted directly.
Third, whether the signed image can be reused . Make your signature into a picture and save it in the computer, which is convenient for repeated use, but it also means that it is easier for others to fake it after getting the file. When it comes to important documents, you should only operate on devices under your control, and avoid sharing signature files at will.
# Core comparison
| Signature mode | A suitable scene | Need to pay attention to |
|---|---|---|
| Scan or photograph insertion after handwriting | The other party explicitly requires a handwritten signature, or the document itself is a paper scan. | The picture should be clear enough and the signature position should not hold down the text. |
| Add signatures in the PDF editor | If you hold your own documents, you need to sign or confirm the final draft. | Save as a new document after signing, and the original remains unchanged |
| Send a signature request for the other party to sign online | Multiple signatures are required, or the other party is not in the same place | Confirm the recipient and version before sending, and download and save it in time after signing. |
| Digital certificate signature | Scenarios with high requirements for file integrity and authentication | Certificate and corresponding verification environment are required, and the specific requirements are subject to the other party. |
# how to use it
The following is a general process for dealing with PDF signatures in OmniDoc, which is suitable for contract confirmation, form signing, and approval.
- Confirm the file version first. Check the page number, amount, date and attachment to make sure this is the final draft to be signed.
two. If you need to modify the content, first use the PDF editor to modify the paragraph text, save as a new file, do not overwrite the old version.
- If it is a scanned piece, first use OCR to identify the text, and then check the recognition results item by item.
- When you sign by yourself, open PDF in the desktop client, use the signature function to add the signature at the specified location, check the location and size, and save it as a new file.
- When the other party's signature is needed, send the PDF on the omnidoc.top using the signature request function, wait for the other party to sign online, and then download the signed version and save it.
- If you need to fill out the form at the same time, you can complete it before signing and make sure that there are no changes after the signature.
The desktop client on the computer side can be downloaded from download.omnidoc.top. You can also use app.unidoc.top if you need to edit Word-compliant documents on a web page.
# which method is suitable for you?
If you sign and confirm it yourself, select the PDF editor to add the signature, save it as a new document, and keep the final version. If you need someone else to sign, use the signature request first to reduce the hassle of printing and scanning back and forth. If the other party explicitly asks for a certain form of signature, such as stamping or digital certificate, prepare according to the request of the other party first, and do not change the method because of the convenience of operation.
# frequently asked questions (FAQ)
1. Can others modify the content after PDF adds a signature?
If the signed file is modified directly, the signature will no longer correspond to the content. It is recommended that you save it as a new version after modification, re-sign it, and keep the old version for verification.
2. Does the signed picture on PDF have legal effect?
The validity depends on the legal provisions of the place and the agreement of both parties, and the signature picture itself cannot come to a direct conclusion. When it comes to a formal contract, you should first confirm the acceptable form of signature to the other party and consult a professional if necessary.
3. Can the scanned version of PDF sign directly?
You can add a signature, but the scanned piece usually cannot select the text, so you need to do OCR before modifying the content. OCR results should be checked item by item, especially numbers and names.
4. What's the difference between a signature request and a direct signature?
Direct signature is suitable for your own holding of documents and your own confirmation; signing request is suitable for the situation that requires the signature of the other party, so that the other party can complete the signature online and reduce printing and return transmission.
5. How should the signed document be saved?
Keep the signed PDF and the corresponding original version, with the date or version number in the file name. If there are multiple changes, keep each version in order to make it easier to check later.
# Summary
What is the use of PDF plus signature? the core is to make the confirmation action correspond to the specific version and leave a searchable record. Most disputes can be avoided by checking the content before signing and saving the version after signing. It is more practical to choose a handwritten scan, editor signature, or signature request based on the scenario than to pursue some form.
