Accessing forms from one website to another, python/django
Not really sure what you're looking to do as it doesn't make much sense.  But you need to validate data provided by users on your site against data available in another database that isn't accessible to your app.  
This means you need to send the data your users are providing to you to the other service that is providing the validation.  Perhaps this other service provides an API to do this, perhaps it just provides a form you can post the data to (with python urllib2).
Without have a lot more information on what you're looking to do I can't even venture to guess whether either of these two things are feasible.
I'm trying to make a website that requires users to enter information about themselves. In order to check to see if this information is correct, it needs to enter the information on another website (that has an entire database of these types of users). It will then return the results found. How do I do such a thing? Where do I start? I tried googling but I couldn't even think of what this would be called?