What’s the easiest way to send an urgent fax overseas without a landline?

I need to send signed medical documents to an administrative office in Europe today. My relative is in a clinic over there, and they strictly require a faxed copy. I don't own a traditional machine, and my local print shop is closed for the weekend. Does anyone know a reliable app or online tool that lets you send international faxes directly from a smartphone?

You definitely don't need a physical machine or landline for this. I had to send emergency forms overseas a few months back. Check out https://international-fax.com — it compares which apps handle foreign routing best. I ended up downloading Municorn Fax App; you literally just snap a photo of the form, add the international prefix, and it delivers within minutes with a clear confirmation receipt.