Additional steps after authentication

I have an application using forms authentication with the following
requirement. After user logs in the application needs to to perform some
checks. If all checks are satisfied user is redirected to the original page
she requested. If one or more checks fail user is redirected to other page
to make some changes. After that checks are performed again until all of the
ckecks are satisfied and user is redirected to the original page. What is
the best way to accompish something like this?

Thank you,
Alex

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