What should a security guard do if they realize an error has been made in their notes?

The appropriate action when a security guard identifies an error in their notes is to draw a line through it and initial it. This method maintains the integrity of the record while clearly indicating that a mistake was made. Erasing an error can compromise the reliability of the notes, as it removes any trace of what was initially recorded, potentially leading to confusion or disputes about the information. Leaving the error uncorrected may lead to misinterpretation or misunderstandings later, as it does not provide any clear indication of the mistake. Consulting a supervisor is generally a good practice for seeking guidance on various issues, but it does not directly address how to manage the error in the notes themselves. Thus, crossing out the error and initialing is the best approach as it ensures accountability and clarity in documentation.