Depends on how good Radar is these days. I’d recommend some sort of identity verification service for new accounts. Not a full background check but a few additional hurdles weed out many unsophisticated fraud attempts. Anecdotally, a friend told me that calling new signups and manually verifying them works well. At this stage this would have the bonus for you of learning more about the folks using your system.

This is actually covered by stripe connect - users wanting to accept card payments through Rentify need to go through stripe’s is verification process, which involves uploading copies of your ID. Stripe also provides chargeback protection, which I have enabled, which covers any costs due to fraud

That’s great to hear; that’s a huge value add if it’s effective!