What must a supervisor ensure before giving an activated shop card to a member?

A supervisor must ensure that the transaction is completed and payment is finalized before giving an activated shop card to a member because this step is crucial for ensuring that all financial processes are accurately recorded and that the member has fulfilled their purchasing obligations. Finalizing the payment before handing over the shop card prevents any potential discrepancies or issues that could arise from a transaction that is not yet completed. This process helps maintain the integrity of the sales transaction and guarantees that the member fully owns the rights and privileges associated with the activated shop card. Completing the transaction also confirms that the member is authorized to use the shop card, ensuring that Costco adheres to its policies regarding payment and card activation.