In short
It depends on two things: which channel your recipient accepts, and what you may later have to demonstrate. Email is instant but can disappear into a filter without anyone noticing; a fax yields a transmission report produced during the exchange with the receiving machine.
Strengths and weaknesses
Email costs nothing and arrives at once, but a spam filter can quietly set it aside, and a read confirmation is optional for whoever receives it. A fax gets through in one to two minutes to a machine that confirms the pages arrived; with FaxTelecom, one page is free and the receipts option costs €2.99 VAT included. Registered post, slow and paid, enjoys the most precise legal framework.
Two questions to decide
Which channel does my contact list? An organisation that prints a fax number on its letters has already answered. What will I need to prove, and by when? A legal or contractual deadline can impose a specific form, often registered mail. Our fax, email and post comparison goes through each situation.
Using two channels
Nothing prevents you from stacking channels: a fax to move fast and obtain a transmission receipt, then an email or registered letter if the applicable rule requires it. Archive the receipt with the exact PDF you sent, so you can later show what left and when.
Key points
- Email: instant, but a filter can set it aside silently.
- Fax: transmission report tied to the receiving machine.
- Registered post: the most precise legal framework, but slow and paid.
- Choose based on the accepted channel and the proof required.