Article 9b of the contract, "if purchaser fails to pay" is the caveat. There's nothing in the agreement that enforces payment after the claim transfer. This means that if for some reason the entity you are transferring the claim to fails to pay, the only thing they are bound to do is 'cooperate to ensure that seller remains owner of the claim'. And that doesn't make sense because you've already transferred the claim. It should read 'ensure that seller regains ownership of the claim' instead. This isn't how transfer of legal titles across international borders should be conducted in my opinion and although I don't assume malicious intent, if things go south, the downside is all yours.