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Editorial Team
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Asked: 2026-05-28T16:01:14+00:00

I’d appreciate any help with this, I’ve run around in circles trying all sorts

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I’d appreciate any help with this, I’ve run around in circles trying all sorts of combinations with the PayPal Api – but I’m hitting a brick wall on this one.

I’m looking to call the CreateBillingAgreement method but each time I do it fails and reports a 10001 ‘internal error’ from paypal in the response.
I have a valid token and I’m using version 84.0. I’ve successfully called SetupExpressCheckout and DoExpressCheckout, both of which succeed and the payment goes through. I’m setting up a future payment / pre-authorisation on the SetupExpressCheckout and the user agrees to that no problems.

​Do I need to change settings on the merchant in the sandbox? Am I calling things in the wrong order maybe? (SetExpress, GetExpress, DoExpress, CreateBilling)?

​I’m looking to use this billing agreement to allow a reference transaction in the future. I’m having a test account ‘pay’ using paypal and not forwarding any credit card details, the payment is for a digital service with no delivery (no shipping is set, no addresses or delivery costs are involved). The overall goal is to provide a one-click re-order button, whereby no details need to be entered by the customer.

I’m using the C# api in asp.net 4, or more specifically I’ve created Service References from the paypal sandbox wsdl and I’m using those in asp.net.

​Any and all help is appreciated – thanks.

​Russell.

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  1. Editorial Team

    You don’t need to call CreateBillingAgreement if you’re specifying billingtype MerchantInitiatedBilling in your SetExpressCheckout and DoExpressCheckoutPayment API call. CreateBillingAgreement is only necessary if you don’t want to call DoExpressCheckoutPayment.
    If MerchantInitiatedBilling is set, DoExpressCheckoutPayment will already return a billing agreement ID, which you can use in DoReferenceTransaction.

    I don’t have access to an example at hand, but will update this post as soon as I’ve found one for you.

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