Question 1: what is the type of the document signed by P and D?
it is necessary that the party/P objectively understood the document to be one containing contractual incorporated
BUT if a reasonable person in P’s position should have appreciated that the document contained terms because P was told eg. signing means P agrees to certain things (analogous to Curtis) the receipt is a contract go Q2
● NB. INDUSTRY PRACTICE
Even if the document is headed as (e.g. receipt), it is usually known in this particular industry to contain contractual terms if so, then the document is contract go Q2