I don't know with 100% certainty. I'll ASSUME that all you will see will be a mention of a DME reservation on your WDTC itinerary, listed for your departure day (your final day at WDW).
Then again, you might get sent an entire DME packet complete with luggage tags. If you do, just throw out the luggage tags.
If no one else posts a response about their own experiences in a similar situation, then we'd all appreciate it if you can post your own experiences once they happen (for example, did you receive anything ahead of time, etc.).
THANKS.