It is quite common to come across situations where you are not able to sign Adobe. Check out the best fixes that can help you address the concerns of Adobe not signing you.
You’ve spent hours creating and filling out a PDF form, but when it’s time to sign, Adobe won’t let you. Frustrating, right? Fortunately, there are fixes to resolve this issue.
👉 You can also try PDFgear, a free PDF signature and editing tool.
The cache stores the essential information on the signing feature. If the files or data about these details are corrupted, you may end up with a signing failure. The signing configurations may be damaged or invalid for some reason, and the sign feature will stop working.
Clearing the cache for the app would be primarily based on the version of the operating software you are using. You can use the command prompt on Windows to access and delete the Acrobat folder from App Data under your user accounts.

Clear cache
If your Adobe app is outdated or has any issues, it can create issues with e-signatures. In some cases, you may also need to update the operating system of your Adobe app to the latest version. You can check the version that you are on from the official website. It may also be a good idea to configure the Auto Update option to avoid such issues in the future.
There are several options to check the updates for the app, which include using your default app store.

Update App
If you cannot even type into the fillable fields, that can indicate an issue with the file permissions. The target file may be in a Read Only mode and does not let editing the files. You can check for the file permissions and allow the permissions to edit or sign the forms.
On Windows, you can right-click on the file and select Properties. From the Properties window, untick the Read Only option if it is established under the General tab. On Mac, you can choose the path Choose file->Info -> Sharing and Permissions -> and edit the permissions.

Check Permissions
It is possible that specific signature preferences may not be compatible with the signing feature. In such a case, you will need to resolve the incompatibility of the signing feature. You can do so by following the methods below –
Launch Adobe Acrobat, and go to Preferences ->Signatures. Click on More beside Creation and Appearance. Check the box for Use Modern Interface for Signing and Digital ID Configuration.

Change Signature Preferences
Some of the PDF security features may block signing. You can use your PDF editing software to find the security options for the PDF file. If you find that the security certificate blocks access to the signing feature, there is nothing that you can do about it.
You can ask the author of the PDF file to share an unlocked version of the document so that it can be signed with no hassles. This is a problem that you cannot solve on your end. The security certificate is an integral part of the document and can only be changed by the author of the file in most cases.
Protected Mode or Protected View can also make it difficult to sign the PDF file. This is a security feature offered by Adobe software that can prevent the file from being signed. You must disable the protected mode before attempting to sign the form.
On the Adobe Preferences menu, go to the Security (Enhanced) tab. Untick the option for Enable Protected Mode at Startup. You may need to restart the system before the changes can take effect.

Disable Protected Mode
Warning preferences on Adobe can also prevent the document from being signed. If the software is set to avoid the signing until all the warnings are reviewed, you won’t be able to sign the PDF if there are any warnings.
To fix this issue, you can disable the warning preferences. To do this, follow the path Preferences -> Signatures and set the option Enable Review of Documents Warning to Always and Prevent Signing Until Warning Are Reviewed to Never.

Configure Warnings
When the PDF file has structural issues, it will not allow you to sign it. In such a case, you can use the Print to PDF option to flatten the active fields and let you sign the document. The Print to PDF option will help you use the saved PDF file and edit or sign it without hassles.
On Windows, you can do this by following the steps below –
Fill up all the fields that you can and open the file. Select the Print option and choose the Printer drop-down. Select the Print to PDF option. You can choose Microsoft Print to PDF or decide to use any other Print to PDF option associated with any other PDF software. Save the file at a location that you prefer.
Now, access the file from the stored location and sign it. It should let you sign it properly.

Print to PDF
The fill and sign feature may not work on Adobe when you have any contradictory application interfering with your Adobe product. The most possible culprit in this connection is the Antivirus or Firewall on your system. You can either disable the conflicting application or uninstall it.
Remember that disabling or uninstalling a security app can be risky and put your device and data at risk. Enable or reinstall the software once your issue has been resolved, or you have signed the document.
Those were a few fixes that can help you fix the issue of Adobe won’t let you sign a document. Do note that the steps would primarily be based on the exact causes that may be causing the issue.
We advise you to check the error messages you receive when dealing with the problem. This will give you a proper idea of which fixes to apply. Meanwhile, you may also check different signature fonts for signatures that may make your sign look aesthetic.
Check out the fixes outlined in the above discussion and find which methods can help you with the right fixes.