can editable pdf files to be locked after signature on the ipad or phone?

[benjaminlch]

Hi all good day.

I wonder that can editable pdf files to be locked after signature on the ipad or phone?

On the desktop, it can be locked; however through the ipad or phone, it can' be locked.

Is there any setting that the file can be locked if signed on the ipad or phone?

Many Thanks. 🙂

Ben

[HEIKO5F8E]

Seems to be an old topic, to which I'm also looking for information, maybe someone has an idea or a link to the answer...

I create a PDF form using radio buttons, text fields, and a digital signature field which is set to mark all fields as read only after sign off. Also, the document is password protected against editing... just in case.
However, after signing the document ("Save as" prompt appears) I can't do any changes to the document and the signature validation status shows "VALID". As expected, any changes to the content are not possible.

Synchronizing the file using OneDrive I'm able to open the file using my iPhone and - this is the funny thing - to change the content of all form fields. After saving the file and resync, back on my PC the validations status shows an error "Signature contains incorrect, unrecognized, corrupted or suspicious data."

Not sure, where the issue comes from, and any helps is welcome.
All my tools, like Acrobat Pro or iPhone are up to date.