I tried to enable the acceptance of billing addresses in the PayPal sandbox by adding the following option:
REQBILLINGADDRESS = 1 (described here: https://www.paypalobjects.com/webstatic/en_US/developer/docs/pdf/pfp_expresscheckout_pp.pdf )
To call SetExpressCheckout.
However, I get the following error:
'ACK': 'Failure', 'BUILD': '6675672', 'CORRELATIONID': '4d9afd327754a', 'L_ERRORCODE0': '11601', 'L_LONGMESSAGE0': 'Billing address request is not enabled for merchant', 'L_SEVERITYCODE0': 'Error', 'L_SHORTMESSAGE0': 'Request for billing address failed', 'TIMESTAMP': '2013-06-28T16:32:22Z', 'VERSION': '72.0'
I know getting billing addresses is possible since the Humble Bundle does it here:

How do I change my sandbox account to allow billing requests? and what do i need to do to enable this for a real account?
David Fooks
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