Fix Adobe Fill and Sign Verification Code Screen Disappearing on iPad
Question details
Users are unable to log into the Adobe Fill and Sign application because the multi-factor authentication screen closes before the SMS verification code can be entered.

- Product
- Adobe Fill and Sign / Adobe Acrobat Reader
- Device & OS
- iPadOS and iOS
- Scenario
- Attempting to sign into the mobile application using an account that requires SMS-based two-step verification.
- Observed behavior
- The application successfully accepts the username and password and sends the SMS code, but the code-entry screen flashes briefly and disappears. This prevents code entry and results in a "Sign In Operation Failed" error message.
Ensure your iPad or iPhone is connected to a stable Wi-Fi network and has a strong cellular signal so you can receive the SMS verification code promptly before the session times out.
Restart Your Device and Reinstall the Application
Clearing out the app's cached data by performing a fresh installation often resolves interface glitches and disappearing screens on iOS devices.
A corrupted installation or temporary iOS memory issue can cause the authentication web-view interface to crash unexpectedly. Reinstalling the app ensures you have the latest, uncorrupted files.
Long-press the Adobe Fill and Sign app icon on your iPad or iPhone home screen, select 'Remove App', and then tap 'Delete App' to completely remove it.
Press and hold the power button (and volume button on newer models) until the power off slider appears. Slide to power off, wait 30 seconds, and turn the device back on.
Open the Apple App Store, search for 'Adobe Fill and Sign', and download the latest version of the application.
Launch the newly installed app, enter your credentials, and be prepared to quickly enter the SMS verification code when the screen appears.

Use the Built-in Fill & Sign Feature in Adobe Acrobat Reader
Bypass the standalone app entirely by utilizing the integrated Fill & Sign capabilities within the main Acrobat Reader app.
Fill and Sign PDFs Seamlessly with WPS Office
Avoid frustrating sign-in errors and disappearing screens. WPS Office offers a robust, free PDF editing tool built right in, allowing you to fill forms and add signatures on your iPad or iPhone without login loops.
- 1. Download WPS Office: Install WPS Office for free from the Apple App Store on your iPad or iPhone.
- 2. Open Your PDF: Launch the WPS Office app, tap on the 'Files' tab, and open the PDF document you need to sign.
- 3. Select the Annotation Tools: Tap the 'Tools' icon at the bottom of the screen, navigate to the 'PDF Edit' or 'Annotation' tab, and select 'Fill & Sign'.
- 4. Create and Apply Signature: Tap 'Create Signature', draw your signature on the screen, and place it exactly where needed on your PDF form.

Frequently Asked Questions
Why does the SMS verification screen close automatically on my iPad?
This is typically caused by a bug in the specific version of the standalone Adobe Fill and Sign app (such as version 19.11.1) failing to render the web-view authentication window correctly on newer iOS/iPadOS versions.
Does WPS Office require SMS verification to sign a local PDF document?
No, WPS Office allows you to open, fill out, and sign local PDF documents directly on your device using its built-in PDF tools without requiring you to pass through multi-factor authentication loops.
How can I retrieve my PDF if I decide to switch from Adobe to another app?
You can save your PDF files directly to your device's local storage or iCloud Drive via the Apple 'Files' app. From there, you can easily open them using alternative applications like WPS Office.




