The affiliate ID is the Digistore24 ID and is referred to as the affiliate ID in the context of affiliate-related topics.

In affiliate links the affiliate ID is passed with the GET parameter aff=AFFILIATE, where AFFILIATE is a placeholder. Affiliates replace the placeholder with their affiliate ID to make the affiliate link valid.

Example placeholder:

https://www.some-domain.com/?aff=AFFILIATE

Example placeholder replaced with affiliate ID:

https://www.some-domain.com/?aff=user123