If AB wing invoices ABC squadron for member flying, what else should they create?

Creating a bill for ABC squadron payable to AB wing is essential because it formalizes the transaction and ensures that the financial records accurately reflect the amount owed by ABC squadron for the services rendered. This document serves as a clear request for payment and provides a tangible record of the financial relationship between the two entities.

In the context of finance and invoicing, it's crucial to maintain comprehensive documentation for all transactions. This billing process helps facilitate payments, track financial obligations, and ensures that the accounts receivable are properly recorded in AB wing’s financial statements. By issuing a bill, AB wing is reinforcing the request for payment, which can help manage cash flow and ensure timely collection of funds.

The other options do not fulfill the same purpose. Creating a separate invoice for each member may unnecessarily complicate the billing process, while a credit memo might be useful for adjustments or future services but doesn't serve the immediate need for payment. Stating that no additional documents are required would overlook the importance of maintaining clear financial records and communication.