DCC is a Deep Cheque Clone, almost identical to a DCD (Deep Cheque Document) but worthless.
a DCC might have a stamp, perhaps even a seal but - significantly - no number or signature. it is printed on ordinary paper, therefore of limited durability.

DCCs are used mainly for information and education purposes, when you acquire your DCD you can also obtain a DCC at a nominal cost -- that you can have framed and displayed while the actual DCU is safely stored away. if you have a good reason (think about it!) you can also obtain free DCCs - just ask for them!