International Faxing
Quick answers for sending faxes worldwide. See our full guide and the country codes list.
- How do I format an international fax number?
- Use +[country code] [national number]. Some countries drop a domestic leading 0; others, including Italy, retain it. Example (London): +44 20 1234 5678. See the codes list. A code does not confirm provider coverage.
- How do I check whether my destination is supported?
- The send form checks number format, not provider coverage. Email help@onetimefax.com with the destination country before paying if you need a coverage check. The country-code list is a dialing guide, not a supported-country list.
- What’s the best time to send international faxes?
- During the recipient’s business hours for fastest attention. If it’s urgent, send now and follow up by phone or email.
- Why do international faxes fail?
- Most failures are number-format issues (missing country code, keeping a leading 0), busy destination lines, or unreadable files. See troubleshooting.
- Do I keep the leading zero in European area codes?
- Usually no (UK 020 → +44 20). A common exception is Italy, where the 0 is often kept (+39 06 …).
- What file type is best for international faxes?
- A single, clear PDF is best. Onetime Fax also accepts JPG, JPEG, PNG, TIF, and TIFF files.