I think this is a bug… if not I would appreciate clarification on these flows. Context: My app is using the passwordless email login pattern I’m trying to implement a few different actions within my Post User Registration and Post Login flows. I’ve noticed that the actions attached to the Post Use…

I think I’m experiencing this with the SMS passwordless authentication. My post user registration action creates a record in a database with a field storing the ID of the Auth0 user profile. There is a unique constraint on the value of this field in the database. When I log in with a previously logg…

Hi @zola.mcadie and @wing , Thank you for this feedback request! Our Engineering teams are currently working on resolving this issue. Thanks.

Hello, has this been fixed? We are experiencing this issue right now in our setup and it’s causing problems. Thanks!

Hi, same issue here. We are saving the id of auth0 in our DB after a signup. Our workaround is to basically ignore duplicate errors but we would like to throw exceptions if there are conflicts (in case the error comes from elsewhere) @rueben.tiow could we have an update here please ? :slight_smile: …

Also experiencing this for the passwordless email flow. Is there any known workaround to dedupe these events in the execution context of the action (e.g. without relying on downstream consumers to dedupe it)?

We are also experiencing this bug. We use Passwordless authentication and are sending out a welcome email through Postmark in the Post User Registration action and it sends every time a user logs in.

Post User Registration actions run after passwordless user login

Product Feedback

wing January 12, 2022, 1:36am 3

Updates in this thread.

Topic		Replies	Views
Post user registration actions run after passwordless user login, even if user already exists Get Help bug	11	3137	January 20, 2026
Post user registration flow firing on every passwordless login Get Help	3	2519	December 22, 2022
Post-user-registration trigger for actions not called Get Help	14	8030	March 28, 2022
Problems with 'Post User Registration' action Get Help extensions , auth0-authorization	3	2462	March 13, 2023
Auth0 post registration action doesn't work Get Help	8	4421	September 8, 2021

Post User Registration actions run after passwordless user login

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