What are the appropriate means for leaving evidence of presence?

Leaving evidence of presence can be achieved through various means, such as signing a guestbook, leaving a note, or taking photos in a location. Digital methods include posting on social media or using location-based apps to check in. Additionally, tangible items like footprints, discarded objects, or even personal belongings can serve as evidence of having been there. The method chosen often depends on the context and the intent behind leaving the evidence.