Do I need a Qualified Intermediary for a 1031 exchange?

Hello there, I'm curious about the specifics of a 1031 exchange and its requirements. Specifically, I'm wondering if I absolutely need to engage a Qualified Intermediary for the process. Can you elaborate on the importance of having a Qualified Intermediary and what potential complications could arise if I choose not to involve one? Additionally, are there any alternative options or considerations I should be aware of when navigating a 1031 exchange? Thank you for your time and insight.