[Home](./index.md) > [sip.js](./sip.js.md) > [SessionDialog](./sip.js.sessiondialog.md) > [notify](./sip.js.sessiondialog.notify.md) ## SessionDialog.notify() method The NOTIFY mechanism defined in \[2\] MUST be used to inform the agent sending the REFER of the status of the reference. https://tools.ietf.org/html/rfc3515\#section-2.4.4 Signature: ```typescript notify(delegate?: OutgoingRequestDelegate, options?: RequestOptions): OutgoingNotifyRequest; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | delegate | OutgoingRequestDelegate | | | options | RequestOptions | Options bucket. | Returns: `OutgoingNotifyRequest`