How to complete the Dropbox Fax porting letter of authorization

Updated Oct 08, 2026

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The information in this article applies to all Dropbox Fax users.

If you received the Dropbox Fax Letter of Authorization (LOA) to fill out in order to port your number, you can use this guide to help you complete.

LOA fields

  • Company (or Individual) Name: Enter the name (company or individual) that your account is under with your current carrier.
  • Address: Enter the service address that's referenced on your bill.
  • Current Service Providers: Enter your current carrier who you pay for your number.
  • Current Account Number: Enter the account number associated with the fax number.
  • Type of Traffic: Enter Fax.
  • Telephone Number Begin: Enter your 10-digit fax number. If you're porting more than one number, use the enter key to fill in the space beneath.
  • Provide BTN (billing telephone number): Enter your contact phone number associated with your account.
  • Port Date Requested: Enter today's date or ASAP. If there's a deadline, please specify the deadline in your email to support.

Send the LOA

After you’ve completed filling the fields, do the following to send the LOA to support:

  1. Print your name.
  2. Add your signature.
  3. Click I agree. The LOA is sent to support and a copy is sent to your email.

Learn more about how the porting process works.

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