When sending SMS messages, you can add any comment to the end of the text that clarifies or supplements the SMS message for the sender.
This text will not be sent to subscribers and will not affect the cost of SMS and is available for viewing and filtering in the list of sent messages in your personal account.
To add a comment, you must specify a special combination "\n~~~\n " at the end of the text of the SMS message intended for sending
(line feed, 3 of the tilde character, and again line feed), and after that, any text that will be considered a comment will not be sent to the subscriber,
but will be displayed in the history.
Examples:
Sending a single message:
Hello!
~~~
Comment
https://smscentre.com/sys/send.php?login=alex&psw=123&phones=79999999999%2C78888888888&mes=Hello!%0A~~~%0AComment
Sending multiple messages via the list parameter:
Comments in SMS messages