Check for partner cookie on registration

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Hello,

I wonder if there is an application / built in support for the following use case:

 

We got a partner website redirecting traffic to our forum registration. On the partner's website they will set a cookie and in order to track how many (and especially what users) are coming from our partner's website we want to check for the set cookie on registration. If it sets we want to add some sort of identifier to the user's profile in the database so that we could potentially select all users acquired through our partner.

I assume that this is a kinda common use case for many forum owners so I wonder if there are already existing applications allowing that kind of tracking?

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@Joel R @Adriano Faria I'd say you guys got the best overview of the marketplace, can you maybe help me?