Piece of cake
Your settlements are loaded on your Comcard/fuelcard. You may use the Comcard as an ATM card for cash on the road. You can also deposit money directly to your home bank account from the Comcard using the 800 #, your card # and your PIN#. Comcheck does charge a small transaction fee and you can check with your payroll folks to find out what it is.
The system works well, but the ATMs in the truckstops are a ripoff, charging $1.50 and up for each withdrawal transaction. To me it is ridiculous to pay $2 for a small withdrawal and I've watched people withdraw $20 - 40 from their cards. That's nuts!
Best bet is to make one big withdrawal if you must (I think $200 is usually the max) or cash a Comcheck when you fuel.