When a plaintiff sues a party who was not privy to the contract upon which the claim is based, the declaration must contain clear and specific averments establishing the legal basis for that party's liability. The doctrine of privity of contract restricts enforcement of contractual rights and remedies to contracting parties, excluding third parties. Where a plaintiff seeks to hold a third party liable on the basis of an agency relationship, the declaration must plead the specific nature of that agency (express, implied, apparent, or by ratification) with sufficient particularity. When a claim is based on misrepresentation, rule 36(7) requires that particulars (with dates and items if necessary) be stated in the pleading, including the elements of the delict: conduct, wrongfulness, fault, and causation of damage. An exception must be determined solely on the face of the pleading itself without reference to extrinsic evidence or other court files. Where an exception is upheld on grounds that a declaration discloses no cause of action, the invariable practice is to order that the pleading be set aside and grant the plaintiff leave to file an amended pleading within a specified time, unless there is no possibility of amendment disclosing a cause of action or the plaintiff has indicated no intention to amend.