pmpro_ipn_check_receiver_email

Change how the email is checked in the PayPal IPN handler. Passes true or false and an array containing the receiver email and business email.

pmpro_checkout_start_date

This hook pmpro_checkout_start_date allows you to change the start date of a membership before checkout.

pmpro_ipnhandler_level

FIlters the membership level passed and changes the order accordingly. Passes the membership level ID and user ID of the order.