A: Probably, yes. When you go the restaurant to deliver goods for the restaurant, you hold the status of a "business invitee". The restaurant therefore has an obligation to inspect the area where you are expected to be for any unsafe conditions, and to either correct the unsafe condition or to warn you about it. Also, the person who made the prior delivery and created the greasy condition may have been negligent as well. That person and his employer may therefore have some liability. While we certainly would need more facts in order to make a definitive determination, the factual scenario you lay out sounds to us like you may well have a viable case.
