How to Block Incoming Fax From Unknown Senders?

General
Billing Can I Pay with a Debit Card? CocoFax Privacy Protection How Can I Create a Shortcut to Cocofax on My Desktop? How to Choose the Right Plan? How to Connect My Printer to My Cocofax Account? Send Fax Subscription What Browsers Can CocoFax Run On? What is a Team? What is CocoFax Refund Policy? What Payment Methods Are Available? Where to Download and Use Cocofax? Why is My Account Blocked and How to Unblock It？ Why "Your Card Does Not Support This Type of Purchase"?
Send Fax
Can I Send My Fax in Color? Do I Need a Fax Number to Send a Fax? Fax Number Format How Can I Add a Cover Page to My Fax? How Can I Add a Note to My Fax? How Can I Download Faxes I Have Received or Sent? How Can I Get More Free Fax Pages to Send Faxes? How Can I Reply to a Fax? How Can I See the Status of a Sent Fax? How Can I Send a Fax to Multiple Fax Numbers at Once? How Long Does It Take to Send a Fax? How Much Does It Cost to Send a Fax? How to Check if the Faxing Is a Success? How to Choose a Resolution for Faxing? How to Resend Fax? How to Schedule Fax? How to Send Fax From Firefox? How to Send Fax on Linux? How to Send Fax? How to Send IRS Forms With CocoFax? How to Use the Retry Option? Supported File Types for Faxing Tips for Avoiding Fax Failures What is the Maximum Size of Attached Documents in a fax? Why Did the Recipient Not Receive the Fax After I Sent It Successfully？
Profile
Can I Cancel My Plan? Can I Send and Receive Faxes in My Email? How Can I Add Credits to My Account? How Can I Change My Current Fax Number? How Can I Change My Payment Method? How Can I Check the Remaining Pages in My Plan? How Can I Edit My Password? How Can I Get a Plan? How Can I Recover My Password? How to Forward Received Faxes to Multiple Recipients? How to Port Your Fax Number to CocoFax? What is a CSR?
Contacts
How to Add a Contact? How to Add a Group? How to Add a Number to the Blacklist? How to Block Incoming Fax From Unknown Senders? How to Send a Fax to One or Several Groups?
Business & Enterprise
How to Allow Multiple Users to Receive Email Notifications for One Fax Number? How to Assign Multiple Numbers to One User? How to Assign One Number to Multiple Users? How to turn on/off 2FA? What is the default number and how to change it?

You probably will receive spam faxes sent from senders with an unknown fax number. To block such annoying spams, simply click “...” of the corresponding item in the list, select the "Blacklist" option to create a blacklist for this sender.

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