What does the abbreviation c/c stand for on a payslip?
We need more context. On any document it could stand for 'carbon copy' (just a copy; the 'carbon' is a reference to an old, imperfect, messy, fiddly, and thankfully largely extinct way of making copies that were almost illegible). On some payslips it could stand for "child care". I'm sure I could think of other possibilities... ( what about 'charitable contribution'? )