its as and when due.....
Unless you worked for it , probably not. Most people know when they have money due to them. If you have to ask, then the answer is no. Sorry.
notes due............. due notes just sounds wierd
It depends on the circumstance. If the sous-chef outranks you, it is not necessarily wrong to address them as "Chef". Usually the title is reserved for the Executive Chef or Head Chef, and addressing...
Sue, like the name. The final s is silent.