Transport Capacity Ticket Question

I was wondering if this would work:

Problem: Third party demand reimbursements for transport are kept on
spreadsheets. I would like to automate this process.

Solution: Is it possible to enter a capacity ticket with a counterparty
(like ConEd), not a pipeline, and show a negative amount (or the opposite of
what we enter in when we are paying out a charge) therefore resulting in a
credit to the desk for that amount? Would the system accept such an entry
and would this generate the proper documentation for accounting?

For example, if the East Desk has a deal where ConEd releases capacity to ENA
at max rate, but then reimburses ENA for the demand charge (ENA pays the
commodity costs), the tickets would be entered as follows:
1) a transportation capacity ticket showing demand charges of $.10,
Counterparty = Transco - ENA will pay $$$ to the pipeline
2) a transportation capacity ticket showing demand charge of -.10,
Counterparty = Con Ed - ENA will receive $$$ from ConEd

It seems like this should work and would eliminate one more manual piece of
this transport p&l.
Please advise.