When a recurring subscription starts, I pass through the custom variable that contains the User ID After user payment on my system, I receive two IPN, subscr_signup and subscr_payment. Both have custom variables that allow me to identify the user.
However, for future recurring payments, will I continue on IPN Custom Variables? Should I rely on subscr_id instead of custom?
Thank you. Answer: Yes I have found, custom variables are always in every continuous IPN post.
Excerpt:
Custom both signups and payments are passed through IPN posts and continuous IPN positions, there is not such a variable which previously passed back in the payment IPN It has not been repeated in people again. Only the identified factor will be a sign-up or if there will be a different price for the first period of payment.
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