Hi Sebastien,
To find your Affiliate(review) ID go to:
WP admin -> click on ‘Reviews’ menu -> click on ‘Reviews’ menu item -> The WP will show you the list of affiliate/Reviews you have in your DB.
Hover (put your mouse on – dont click on it )on the review name you want to know its ID -> at the bottom of the browser screen the URL will show up, something like that: “https://yourdomain.com/wp-admin/post.php?post=238&action=edit”, look at the ‘post=’ parameter.
In this example the Affiliate/Review ID is 238.
Discoman