You are able to choose between two states for newly registered affiliates:
Automatically approve all affiliates after sign up
Manually approve all affiliates that signed up.
Automatically approved affiliates are let into the system right away after registration.
A welcome email is sent to them after registration with information on how to log in to the system.
Manually approved affiliates are not let into the system right away after registration. They enter a page stating they will be handled by you soon and they are unable to enter the system until you approve them.
A "pending welcome" email is sent to them right away after registration and when they are manually approved by you, then the welcome email after approval is sent to them.
How to Approve an Affiliate
Affiliates are able to be approved or rejected in the affiliate list in the detail of the affiliate.
When an affiliate is approved, an email stating the registration was approved is sent to them.