Looking for a free online fax service? Here's some current market information on the topic.
Over time, providers of free fax services seem to have come and gone. Even Google offered a free service at one time. There’s a cost to processing faxes and doing it for free is just not a successful business practice. However, there are ways to do faxing for free.
Microsoft Office has a free faxing option. HOWEVER, it requires a phone line, which would cost about $20- per month. That would cost more than just getting a $10- discount online fax service. Another advantage is that you would then have an actual fax number that could be published.
For another good option see this post about how to recycle your old fax machine.
While some online fax providers require set up fees and contracts you could just use a temporary fax service for any project, like a real estate transaction.