That means once you go off the record with a particular person, you will always be off the record with him or her, even if you close the chat window, and the two of you don’t chat again until several months later.
Nangangahulugan iyon na sa sandaling mag-off the record ka sa isang partikular na tao, palagi kang magiging off the record sa kanya, kahit na isara mo ang window ng chat, at pagkalipas pa ng ilang buwan bago kayo muling mag-chat.