Each  organization that is incurring costs, earning revenue, or otherwise  assuming a portion of responsibility for an event should submit its own  Student Event Information Form.
The SEIF should indicate the  organization's expected costs and revenues associated with that event  and should also list the names of other co-sponsoring organizations in case the paperwork needs to be cross-referenced.  The flyers attached  to each SEIF should also list all of the co-sponsoring organizations.  

(Note: if your organization is paying a portion of a bill or invoice requesting partial reimbursement for an expense, see "What if the dollar amount on a voucher does not match the sum total of the receipts?")