Contracts have this field in toplevel, and the wallet does not accept it yet.
The case 200 is done. We need to manage a payment not well ended, or a redirect we may get from the merchant, or a well ended payment but not acknowledged by the merchant. To be designed and implemented.
.. therefore breaking the autoclicking performed by buildbot-driven selenium
The question was whether it is 100% necessary or not to include H_contract in fulfillment URL.<br />
Reporting as bug just not let it go in oblivion.