I was frustrated with that exact issue. I signed up for two “free” trials, and both tried to charge me after a few pages. Then I stumbled across edp-award.com, where they listed the top genuinely free fax options. I tested one of the recommended services, and it worked surprisingly well—sent a few pages, got a confirmation email, and didn’t need to enter a credit card at all. It’s not a tool I’d use for heavy business faxing, but for occasional needs, it’s perfect. I’d suggest you check out the breakdown there before wasting time like I did—it’ll save you a lot of hassle.