Yes. Internet cafés often have fax machines, and some hotels may have business centers with fax machines.
Can I use my cell phone in Peru?
How do I dial from the U.S. to Peru?
How do I dial from Peru to the U.S.?
What is Peru's time zone?
What are other international calling codes in Peru?
How long will it take a postcard to reach the U.S. from Peru?
What is Internet access like in Peru?