Electronic vs digital signatures
A signature image, a simple electronic signature and a certificate-based digital signature solve different problems. This guide separates visible approval, identity checks and integrity controls without making legal promises.
When to use it
A signature image, a simple electronic signature and a certificate-based digital signature solve different problems. This guide separates visible approval, identity checks and integrity controls without making legal promises. The situations below show when this guide can help you choose the right workflow and avoid unnecessary processing.
- You need to know whether a signature image is sufficient for a particular workflow.
- The recipient requires a verifiable signature or proof that the document has not changed.
How it works
This guide divides the topic into three consecutive stages: define the purpose, review requirements, verify the result. Follow them in order to understand the result and the points that require manual review.
- 01Define the purposeDecide whether you need only a visible page mark, evidence of consent in a process or a verifiable certificate-based signature.
- 02Review requirementsConfirm recipient rules and applicable law before choosing a visual, electronic or digital signature.
- 03Verify the resultFor a digital signature, check certificate and integrity status; for a visual signature, do not claim certificate properties.
What changes
Before starting, identify which parts of the document will change and which will remain intact. The list below describes changes in the output copy rather than hidden modifications to the source file.
- A visual signature is added as a page object without certificate-based verification.
- An electronic process can record consent and supporting evidence outside the visible PDF page.
- A digital signature binds a certificate to content and can reveal later changes.
What can be lost
Some operations affect more than the visible page and can change text layers, forms, links or signatures. This list helps you decide whether the separate output copy is suitable for the next stage of your work.
- Exporting a modified copy generally does not carry over trust from the source digital signature.
- Rasterization or flattening removes verifiable certificate-based signature properties.
Limitations
Limitations describe the current implementation boundary and the cases that require additional review. Check them before uploading, especially when a document is complex, protected or contains important structure.
- Legal status depends on the country, process, agreement and method of signer identification.
- A visual signature alone does not prove signer identity or file integrity.
- Changing a signed PDF can invalidate its digital signature.
Related tools
Related tools let you move directly from the explanation to the appropriate action. Each tool uses its own workflow and shows its specific limits before processing starts.