Allow user to fill out node form, then force registration I'm making a classified website.

Have a button that say "Make a ad"
I would like the Anonymous  user to be able to
fill in the text for the ad.

But the  Anonymous users after filling in advert.
has to sign up for the ad to be posted

How can  do this with drupal please?

many thanks for your help

Best Regards
Charles
There are many ways to achieve this. Two suggestions:


Check out the Rules module. There's a tutorial for your use case described here.
Or use one of the modules already available, e.g. Inline Registration.