Is it possible to decrease the recurring payment amount/rate using NVP API Operation for a recurring payment profile created using Express Checkout ?
I read here, merchant can increase the amount by 20% of the original amount every 180 days from the profile started date. However, it does not mention about decreasing the amount.
I know it is possible to do it manual through Paypal Interface. I have tested this in Sandbox environment.
In our flow, one recurring payment profile can accommodate more than one item/service. So if one of the services is un-subscribed, we have to decrease the amount of the corresponding profile.