What could cause a serious error when using a fax machine?

Using the redial button to fax pharmacy copies could lead to a serious error if the last number dialed is incorrect or if it was intended for a different recipient. The redial function often calls the most recently used number, which might not always match the intended recipient for sensitive documents like pharmacy orders. This could lead to confidential information being sent to the wrong party, risking patient confidentiality and compliance with privacy regulations.

In contrast, using a new roll of paper is standard practice and ensures that the fax machine can operate without interruption. Finding the number in a directory is a necessary step for accurate communication, as is checking the recipient's name carefully, both of which minimize the potential for errors when sending faxes. These practices ensure that the intended recipient receives the correct and sensitive information.