When a subscription payment is made, the invoice number that the customer paid does not appear in the payment description in PayPal.
So how can I identify which order I paid for?
This is a big problem, since I only have the name of the product and a payment email.
but I have clients who pay with a different email than their account.
In the reminder notes you must have the invoice number of the payment.
is there any way to update this urgently?
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Thanks for your suggestion.
Presently WHMCS adds the Service ID the custom_id field, and the invoice ID in the Purchase Unit description, which we feel is the best way to handle such as one-to-many relationship: https://developer.paypal.com/api/orders/v2/#definition-purchase_unit
PayPal's support team will be best placed to advise where to view the Purchase Unit description in their UI.