Fax Credit is an internal currency, specifically intended for the Fax to Email service, that lets you use your email address to send and receive faxes.
To be able to send faxes, you need to add enough Fax Credit to your account. The same rule applies to receiving faxes. Note that you will only be charged for sending faxes, not receiving.
If you have ran out of Fax Credit, the system will still receive the fax that was sent for you. However, it will not be processed and transferred to your inbox until you have purchased enough Credits. We hold incoming fax messages for up to 365 days.
Know more about Fax Credit in the articles below: