> For the complete documentation index, see [llms.txt](https://integrations.impact.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://integrations.impact.com/brand-api-reference/advocate-api-reference-v1/reference/referral-overview.md).

# Referral Overview

A Referral records the relationship between two users: the referrer (the customer advocate who shared a referral) and the referee (the friend who acted on it).

Key aspects of a referral:

* Each referral links exactly one referrer to one referee.
* A referrer can have many referrals; a referee can only be referred once (see [Account Overview](/brand-api-reference/advocate-api-reference-v1/reference/account-overview.md)).
* Referrals are the basis on which rewards are calculated and issued.


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