Two clients of your firm, namely, W and D want to conclude a deed of sale with each other. They ask you to draw up the deed of sale. In particular, they want you to draft a clause in the agreement to the effect that the purchase price will be payable to the purchaser D upon registration of transfer (to be registered by your law firm). They insist that they want you to act for them in this matter. W, in the meantime, wants you to register a bond over the property that he is in the process of selling to D, prior to the registration. Discuss what you should do in the circumstances with reference to any conduct rules or case law which govern the matter.