Invalid Number Errors

An invalid number error means VoltFax could not recognize or connect to the destination fax number.

Common Causes

• Incorrect fax number
• Missing area code
• Missing country code for international faxes
• Extra digits or formatting errors
• Disconnected or inactive fax number

Troubleshooting

Before resending:

• Verify the recipient’s fax number.
• Include the correct country code when sending internationally.
• Remove unnecessary spaces or special characters if required.
• Confirm that the destination number is capable of receiving faxes.

Correcting the fax number often resolves this error immediately.