Depending on what notification settings you have, and what permissions were given to you at your organization, when a fax is received by your organization, applicable teammates will receive a notification to let them know at the organization has received a fax. Additionally, you can head to the 'Fax Directory' under the organization admin area, which is located on the top right-hand corner of your screen (picture below). 

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From the Fax Directory, you can view incoming and outgoing faxes, uploaded PDFs for faxing and Blocked contacts.