Final answer:
When a Western Union machine prints out two slips, you should keep the receipt for your records and give the confirmation slip to the recipient to ensure the transaction is completed.
Step-by-step explanation:
When using a Western Union machine and it prints out two slips of paper, you should handle each appropriately. The first slip is often a receipt for the transaction, which you should keep for your records. The second is usually intended for the recipient, providing confirmation and details about the transfer, which must be shared with them to complete the transaction process. Safeguarding these documents is essential, as they contain sensitive information that could be misused if lost or stolen.