# Host can not register for webinar **URL:** \ **Category:** API and Webhooks\ **Created:** [October 28, 2020, 6:44am UTC](https://devforum.zoom.us/t/host-can-not-register-for-webinar/34501 "2020-10-28T06:44:40Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![jimmy.tang](https://avatars.discourse-cdn.com/v4/letter/j/e68b1a/32.png) [@jimmy.tang](https://devforum.zoom.us/u/jimmy.tang)\ **Post date:** [October 28, 2020, 6:44am UTC](https://devforum.zoom.us/t/host-can-not-register-for-webinar/34501/1 "2020-10-28T06:44:40Z")
I created a webinar using the API (webinarId 91073999662). Then I add participants, panelists and set alternative hosts using the API. To make sure that the list of participants does not intersect with the list of alternative hosts, I set the “alternative\_hosts” property to an empty string before adding participants and panelists. However doing so I still get “code: 3027; msg: Webinar host can not register for the webinar” when I register [34657011@clsaforum.com](mailto:34657011@clsaforum.com). The webinar host email is [forumwebinar100@clsaforum.com](mailto:forumwebinar100@clsaforum.com). This behavior seems to occur sporadically. The webinar details is as below: { “agenda”: “”, “created\_at”: “2020-10-23T07:59:11Z”, “duration”: 55, “host\_email”: “[forumwebinar100@clsaforum.com](mailto:forumwebinar100@clsaforum.com)”, “host\_id”: “r5G\_yhwYR1e9eSRU0GRT8A”, “id”: 91073999662, “join\_url”: “[https://clsa.zoom.com/j/91073999662?pwd=MXNIOGR5YlBJWGJ4enp6ZjlrTVZhZz09](https://clsa.zoom.com/j/91073999662?pwd=MXNIOGR5YlBJWGJ4enp6ZjlrTVZhZz09)”, “password”: “37744341”, “registration\_url”: “[https://clsa.zoom.com/webinar/register/WN\_4cHcPqALT\_uXAsWfRKoLAg](https://clsa.zoom.com/webinar/register/WN_4cHcPqALT_uXAsWfRKoLAg)”, “settings”: { “allow\_multiple\_devices”: true, “alternative\_hosts”: “”, “approval\_type”: 0, “audio”: “both”, “auto\_recording”: “none”, “close\_registration”: false, “contact\_email”: “[forumwebinar100@clsaforum.com](mailto:forumwebinar100@clsaforum.com)”, “contact\_name”: “100 CLSA Forum Webinars”, “enforce\_login”: false, “enforce\_login\_domains”: “”, “global\_dial\_in\_countries”: [ “HK”, “SG”, “AU”, “IN”, “JP”, “GB”, “CN”, “US” ], “global\_dial\_in\_numbers”: […], “hd\_video”: true, “host\_video”: true, “meeting\_authentication”: false, “on\_demand”: false, “panelists\_video”: true, “post\_webinar\_survey”: false, “practice\_session”: true, “question\_answer”: true, “registrants\_confirmation\_email”: false, “registrants\_email\_notification”: false, “registrants\_restrict\_number”: 0, “request\_permission\_to\_unmute\_participants”: false, “show\_share\_button”: false }, “start\_time”: “2020-10-30T12:00:00Z”, “start\_url”: “[https://clsa.zoom.com/s/91073999662?zak=eyJ6bV9za20iOiJ6bV9vMm0iLCJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.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.kJVdwnHVfogNCmowbyHGJXvgBpanN64WbGDCQmtP170](https://clsa.zoom.com/s/91073999662?zak=eyJ6bV9za20iOiJ6bV9vMm0iLCJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.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.kJVdwnHVfogNCmowbyHGJXvgBpanN64WbGDCQmtP170)”, “timezone”: “Asia/Kolkata”, “topic”: “The Chinese and American models for big internet companies are both destined to fail”, “type”: 5, “uuid”: “WwnJJnSlQaK/j9l/mGpz4g==” } ---
**Author:** ![jimmy.tang](https://avatars.discourse-cdn.com/v4/letter/j/e68b1a/32.png) [@jimmy.tang](https://devforum.zoom.us/u/jimmy.tang)\ **Post date:** [October 28, 2020, 8:01am UTC](https://devforum.zoom.us/t/host-can-not-register-for-webinar/34501/2 "2020-10-28T08:01:27Z")
The simplest way to trigger the message is to go to [https://clsa.zoom.com/webinar/register/WN\_4cHcPqALT\_uXAsWfRKoLAg](https://clsa.zoom.com/webinar/register/WN_4cHcPqALT_uXAsWfRKoLAg) and try to register [34657011@clsaforum.com](mailto:34657011@clsaforum.com). It should say cannot register host, but the host is [forumwebinar100@clsaforum.com](mailto:forumwebinar100@clsaforum.com) and the alternative\_hosts field is empty. ---
**Author:** ![will.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/will.zoom/32/14417_2.png) [@will.zoom](https://devforum.zoom.us/u/will.zoom)\ **Post date:** [October 29, 2020, 5:09pm UTC](https://devforum.zoom.us/t/host-can-not-register-for-webinar/34501/3 "2020-10-29T17:09:11Z")
Hey @jimmy.tang, Thanks for reaching out about this—I’m happy to take a closer look. Can you please share the Add Registrant request URL and Body that you’re passing when you get this error? Thanks, Will ---
**Author:** ![jimmy.tang](https://avatars.discourse-cdn.com/v4/letter/j/e68b1a/32.png) [@jimmy.tang](https://devforum.zoom.us/u/jimmy.tang)\ **Post date:** [October 30, 2020, 1:56am UTC](https://devforum.zoom.us/t/host-can-not-register-for-webinar/34501/4 "2020-10-30T01:56:14Z")
Here you go. Thanks! ```auto POST /webinars/91073999662/registrants {"first_name": "Sunny", "last_name": "Zhang", "email": "34657011@clsaforum.com", "org": "CLSA - Americas"} ``` ---
**Author:** ![jimmy.tang](https://avatars.discourse-cdn.com/v4/letter/j/e68b1a/32.png) [@jimmy.tang](https://devforum.zoom.us/u/jimmy.tang)\ **Post date:** [October 30, 2020, 2:04am UTC](https://devforum.zoom.us/t/host-can-not-register-for-webinar/34501/5 "2020-10-30T02:04:05Z")
btw, I’ve opened a case with support as well: [[https://support.zoom.us/hc/en-us/requests/8461802?page=1](https://support.zoom.us/hc/en-us/requests/8461802?page=1)] ---
**Author:** ![will.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/will.zoom/32/14417_2.png) [@will.zoom](https://devforum.zoom.us/u/will.zoom)\ **Post date:** [October 30, 2020, 9:23pm UTC](https://devforum.zoom.us/t/host-can-not-register-for-webinar/34501/6 "2020-10-30T21:23:54Z")
Hey @jimmy.tang, Thanks for sharing—I can see that the agent working on your support ticket has already opened a ticket with our Engineering team on this, so I will let them continue the conversation with you there. Thanks, Will ---
**Author:** ![system](https://us1.discourse-cdn.com/flex016/uploads/zoomdeveloper/original/3X/6/1/614bdd549b610bbaa46ff934617683a02bdaa03c.png) [@system](https://devforum.zoom.us/u/system)\ **Post date:** [November 30, 2020, 7:23am UTC](https://devforum.zoom.us/t/host-can-not-register-for-webinar/34501/7 "2020-11-30T07:23:56Z")
Closed on November 30, 2020, 7:23am UTC This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.