I have a website lendyourbrain.org
that links to a registration page on another website brainresearch.org
.
I want the URL to stay the same while the visitor completes the registration on the other site. After successful registration, we'll send the user back to a success page on the original domain.
The URLs in question are lendyourbrain.org/register
and the registration page url is brainresearch.org/donor-registration
.
What is the best way to achieve this?