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Hi, PayPal sandbox developer team, I occasionally get an error when using the PayPal sandbox payouts API.   If I attempt the API call a few seconds later it seems to work - it just seems to be an occasional thing.   For reference, I'm making multiple calls in a row to the API with only one transaction per call,  since I don't want the entire call to fail - if I were to put multiple transactions in one POST call, and it failed, I think this may happen if only one email address was not correct.   Here is some relevant JSON/extraneous condensed information:       {"name":"INVALID_RESOURCE_ID","message":"The requested resource ID was not found","debug_id":"7b89b5c146f83","information_link":"https://developer.paypal.com/docs/api/payments.payouts-batch/#errors","details":[],"links":[]} 404 Not Found       Is there any way to know what this error exactly means or is there any way to debug the error?   I can't find any relevant information for this error with the PayPal Payout API.   Also, another question: when I move to production what should be the URL be for obtaining the token?    In the sandbox I see it is - https://api-m.sandbox.paypal.com/v1/oauth2/token.   Will it be the same link for production?   I appreciate any advice. ... View more

I've recently been able to successfully complete a purchase with the PayPal Sandbox and had POST variables available after the purchase, which redirects to a submission form page (which should only be viewable after payment) on payment: <removed>     I inserted the following code within the "Advanced Variables" section of the button to do this:     return=https://example.com/submit-details-test/ rm=2 custom=alreadyPaid     However, when I attempt to make a live purchase with a real PayPal account with a real payment button, inserting the same code (changing the return URL to reflect my actual site) within the "Advanced Variables", the POST array is empty on return. It's odd because I didn't need to setup PDT or IPN in the sandbox for the sandbox to work.   (I, at the very least, need that custom variable alreadyPaid to be returned so we can verify that a person has paid before letting them view the form submission page.)   Are there specific settings that must be set in the live PayPal account to use this (or can I not receive POST data back on the return URL, but only through setting up IPN?)? ... View more

I've recently been able to successfully complete a purchase with the PayPal Sandbox and had POST variables available after the purchase, which redirects to a submission form page (which should only be viewable after payment) on payment:   array(30) { ["payer_email"]=> string(36) "example.com" ["payer_id"]=> string(13) "4FUN7NBSC787C" ["payer_status"]=> string(8) "VERIFIED" ["first_name"]=> string(4) "John" ["last_name"]=> string(3) "Doe" ["address_name"]=> string(12) "Tester Tests" ["address_street"]=> string(12) "3000 Pine St" ["address_city"]=> string(7) "Testing" ["address_country_code"]=> string(2) "GB" ["address_zip"]=> string(8) "SW1A 1AA" ["residence_country"]=> string(2) "GB" ["txn_id"]=> string(17) "4JL40298VT457961L" ["mc_currency"]=> string(3) "USD" ["mc_fee"]=> string(4) "0.33" ["mc_gross"]=> string(4) "1.00" ["protection_eligibility"]=> string(8) "ELIGIBLE" ["payment_fee"]=> string(4) "0.33" ["payment_gross"]=> string(4) "1.00" ["payment_status"]=> string(9) "Completed" ["payment_type"]=> string(7) "instant" ["handling_amount"]=> string(4) "0.00" ["shipping"]=> string(4) "0.00" ["quantity"]=> string(1) "1" ["txn_type"]=> string(10) "web_accept" ["payment_date"]=> string(20) "2020-07-19T20:05:47Z" ["business"]=> string(36) "example.com" ["receiver_id"]=> string(13) "LTCCDM4GCQZKW" ["notify_version"]=> string(11) "UNVERSIONED" ["custom"]=> string(11) "alreadyPaid" ["verify_sign"]=> string(56) "AcUCovblmWr2tKRnFCWWVIV11FyiA6BhiCk05j3nsD6ht3wW7G7A4Jxa" }   I inserted the following code within the "Advanced Variables" section of the button to do this:     return=https://example.com/submit-details-test/ rm=2 custom=alreadyPaid   However, when I attempt to make a live purchase with a real PayPal account with a real payment button, inserting the same code (changing the return URL to reflect my actual site) within the "Advanced Variables", the POST array is empty on return. I, at the very least, need that custom variable alreadyPaid to be returned so we can verify that a person has paid before letting them view the form submission page.   Are there specific settings that must be set in the live PayPal account to use this (or can I not receive POST data back on the return URL, but only through setting up IPN?)? ... View more