How to Fix Adobe Acrobat Sign SMS Verification Code Not Arriving
Question details
Recipients are unable to receive the SMS verification code required to complete mobile signing in Adobe Acrobat Sign.
- Product
- Adobe Acrobat Sign
- Device & OS
- not provided
- Scenario
- A recipient opens a signature request and selects mobile signing, but does not receive the necessary SMS code after entering their phone number.
- Observed behavior
- The signature request interface opens normally, but the SMS message with the verification code fails to deliver to the provided phone number.
Verify that the recipient's mobile device has strong cellular reception and that the phone number entered includes the correct country code.
Temporarily Disable Two-Step Verification
Turn off two-step verification in the Acrobat Sign settings to determine if it is the root cause of the delivery failure.
Sometimes, authentication conflicts within Acrobat Sign or Acrobat Pro can prevent the generation and delivery of verification messages. Disabling this feature temporarily allows you to test whether the document can be signed without the SMS roadblock.
Log in to your Adobe Acrobat Sign admin or sender account and navigate to the 'Account' tab.
Go to 'Send Settings' or 'Identity Authentication' depending on your account tier.
Temporarily disable the required two-step verification or SMS authentication for recipients, then save your changes.
Send a new test signature request to the recipient and have them attempt to open and sign the document again.
Check Recipient Phone and Message Blocking Settings
Ensure the recipient's mobile device is not filtering or blocking automated SMS messages.
A Reliable and Free Alternative for Document Signing and Editing
If complex authentication roadblocks are slowing down your document workflows, consider switching to WPS Office. It provides powerful, hassle-free PDF viewing, editing, and electronic signature features, making it a highly capable and completely free alternative for your daily document tasks.
- 1. Download and Install WPS Office: Get the free WPS Office application from the official website and launch it on your device.
- 2. Open Your PDF Document: Drag and drop the document that requires signing into the WPS PDF workspace.
- 3. Sign the Document: Navigate to the 'Fill & Sign' tab, create your electronic signature, and place it exactly where needed on the document.
Frequently Asked Questions
Why do SMS verification codes fail to deliver?
SMS delivery failures are commonly caused by carrier-level filtering of short-code numbers, incorrect country code formatting, poor cellular reception, or spam-blocking settings enabled on the recipient's smartphone.
Can I use email verification instead of SMS in Acrobat Sign?
Yes. Senders can modify the authentication methods in their Adobe Acrobat Sign settings to rely strictly on email verification or other identity verification options, bypassing the need for SMS entirely.
Does turning off two-step verification compromise document security?
Temporarily disabling it removes an additional authentication layer, though the document is still protected by the unique secure link sent directly to the recipient's email address. It is recommended to use an alternative verification method if SMS remains unavailable.
