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* parameter BILL is not mandatory in case when automatic bill numbering is switched on.
** If the value of the E-mail address is not sent, sending the bill by E-mail is not possible. If the value of phone number is not sent, sending the SMS is not possible. Note. For SendNotification= 3, if there is no phone number in the request, then the link to the bill will be sent only by E-mail; and if there is no E-mail address in the request, the notification will not be performed at all.