[Home](./index.md) > [sip.js](./sip.js.md) > [ReferrerReferOptions](./sip.js.referrerreferoptions.md) ## ReferrerReferOptions interface Options for [Referrer.refer()](./sip.js.referrer.refer.md). Signature: ```typescript export interface ReferrerReferOptions ``` ## Properties | Property | Type | Description | | --- | --- | --- | | [requestDelegate](./sip.js.referrerreferoptions.requestdelegate.md) | ReferrerDelegate | See core API. | | [requestOptions](./sip.js.referrerreferoptions.requestoptions.md) | RequestOptions | See core API. |