[Home](./index.md) > [sip.js](./sip.js.md) > [OutgoingRequestMessage](./sip.js.outgoingrequestmessage.md) > [toTag](./sip.js.outgoingrequestmessage.totag.md) ## OutgoingRequestMessage.toTag property Signature: ```typescript readonly toTag: string | undefined; ```