Hand out trust in installments. Let people earn the next payment.

Trust works better as a dial than a switch. People tend to run it as all or nothing, handing everything to somebody they just met or refusing everybody entry after one bad experience, and both settings end badly. Graduated trust lets you find out who somebody is at a price you can afford. You give a small amount, see what comes back, and decide from evidence instead of hope.

Try a small piece with somebody new: a minor thing you would rather not have repeated, or a favor with a real deadline on it. What they do with that tells you what to hand over next.