Create specific branding based on referring site

[TTTT]

Hello all - 

We're doing business with a potential partner / affiliate who would like to have co-branding on our site for referrals coming through theirs.

Is there a way to set a cookie or an app that would help to show a logo or extra content based on a referring site? 

[Mika_Lepisto]

You could use JS, set the cookie for referer if referer matches X domain. then check against that to display logo when it matches. If you do it with the cookie it can persist until cookie deletion or expiration.