Whoa, big fella. I wouldn't address them specifically to Granny, unless you like not getting paid for expenses.
Call the expense department, and find out who handles the reports for your specific fleet. Then direct all future expense reports to that person.
Also, find out who is your duty summary person, and deal directly with him/her.
This just saves headache and hassle trying to squeeze $$$ out of Granny.
Good luck,
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