If you need to send just some documents for one time and you no longer need faxing, you should probably go to a copy shop and have them fax your documents.
But, if you need to send and receive fax occasionally, then going for an online solution will be better for you.
About the security, most online fax services offer higher security than the traditional fax machines and they also send a confirmation to your email as soon as your fax is being sent.
By the way here are some of the online fax services you may try. Note that all of these online fax services come with a trial or free subscription, so you can freely try them and then subscribe to the service fitting your needs the best. Don't forget to check the list of supported countries to send and receive fax.
FAX.PLUS: It enables you to send and receive fax from Web, Android, iOS as well as Email. It also comes with Google integration feature to send fax from Google Drive (Google Docs and Google Sheets). It's secure, easy to use and reliable.
Hellofax: Like FAX.PLUS, it is also available for Web, Email and Google Drive. But, Hellofax doesn't offer mobile apps. So, if you need to send and receive fax from your smartphone, you cannot count on Hellofax. It's also secure, reliable, and easy to use.
eFax: eFax is available for most platforms, but it's not as user-friendly as Hellofax and FAX.PLUS. And you may find the canceling process a little bit hard.
I need to send a couple of pages via fax, but I don't have access to any fax machine or fax modem.
Do you know how can I fax my documents?
I did a quick search and found some online fax services to do so. Are they secure and reliable? How can I know whether my fax has been received by the destination or not?