どの受信者のFAX番号フォーマットが許可されていますか？

As Fax.Plus provides the option to select a local fax number from a comprehensive range of countries, it's important to adhere to the international format when inputting the recipient's fax number.

Ensure that your number includes the prefix (+), followed by the international country code, and then the local phone number.

For example: +1 669 200 10 10, or +16692001010.