Is there a way to get website visitors to add topics without registering an account?

[Lilly]

Hi @islamafify4000 Welcome to Meta.
In addition to @Lhc_fl’s reply, as alternatives to explicit un-registered posting, there are also these options, depending on what your needs are:

Enable and configure anonymous mode

When anonymous mode is enabled, logged in users are able to switch from their normal account to an anonymous account. This allows users to create topics and replies without any details being displayed in the Discourse user interface to connect the anonymous user with its associated account. See also: Use anonymous mode to reply or create topics Enable anonymous mode For self-hosted sites, enable anonymous mode by selecting the allow anonymous posting site setting. …

Allow or Restrict Anonymous Posting to Specific Categories

This is a how-to topic that will guide site admins through the process of creating a group for anonymous users to be automatically added to, and then allowing or restricting anonymous posting on a per category basis. Before continuing here, you will need to make sure you’ve enabled anonymous mode on your site. Create a Group for Anonymous Users When anonymous posting mode is enabled, a new anonymous user is created when a user enters anonymous …