Where did the signature disappear?
| Symptom | Common explanation | Safe next check |
|---|---|---|
| It disappears after closing the app | The edit was not committed, or you reopened the original | Save or export under a new filename, then open that exact file. |
| It appears in one viewer but not another | The viewers handle annotations, fields, or layers differently | Test the saved copy in another full PDF viewer before changing it. |
| It is visible on screen but missing on paper | The print job excludes comments, markups, or stamps | Choose a print option that includes Document and Markups or Document and Stamps. |
| A digital signature becomes invalid after editing | The file changed after certificate signing | Return to the unsigned original or use the document owner’s signing workflow. |
| Only the signature image is missing after sharing | A temporary overlay was not included in the exported copy | Export a finalized copy and verify it outside the editing app. |
Step by step
- 01
Identify the kind of signature
A visible handwritten image and a certificate-based digital signature are not interchangeable. The first is page appearance; the second also carries cryptographic validation data.
- 02
Find the exact saved file
Compare filenames, folders, and modification times. Many apparent failures are the unsigned original being reopened instead of the exported copy.
- 03
Check it in another viewer
Open the saved PDF outside the app used to sign it. If the signature appears there, the problem is likely display behavior rather than missing page content.
- 04
Check print inclusion settings
Some print dialogs omit comments or stamps even though they are visible on screen. Use the preview and select the option that includes markups or stamps.
- 05
Finalize image-based signatures carefully
For an ordinary visible signature, a flattened export can make the appearance consistent across viewers. Work on a copy because flattening is normally not reversible.
- 06
Do not flatten a digital signature casually
Changing or flattening a certificate-signed PDF can break its validation. If the file already carries a digital signature, get the unsigned original or instructions from the document owner.
A two-file verification habit
- Keep the unsigned original unchanged.
- Export the finished file under a clear name such as Document-Signed.pdf.
- Open the finished file from Files, inspect the signed page, and use print preview before sending.
Questions
Why is my signature visible in the PDF but not when I print?
The signature may be stored as a markup or stamp that the current print setting excludes. Select Document and Markups or Document and Stamps and confirm it appears in print preview.
Will flattening stop a signature from disappearing?
It can make an image-based annotation part of the page appearance, improving viewer consistency. It is not appropriate for every PDF and can damage certificate-based signature validation.
Why does the recipient say the signature is missing?
They may be viewing a different attachment or using a viewer that handles the annotation differently. Reopen the exact attachment you sent and, for an image-based signature, verify the finalized copy in a second viewer.
Can I repair an invalid digital signature by adding the image again?
No. A visible image does not restore cryptographic validation. Ask for the required certificate-signing process or a new unsigned document.