This document lists signs that a long distance partner may be cheating and provides tips for gathering evidence of infidelity. Key signs of potential cheating include the partner not wanting video calls, new friends of the opposite sex on social media, and not publicly acknowledging the relationship. The document recommends making surprise visits, checking phone/text records, and running background checks to look for evidence like nervousness during visits or unrecognized numbers. It cautions that rebuilding trust after long distance betrayal can require a lot of difficult work.