Close it first if it folds. If it is fixed, offer it handle first with the edge turned away from both of you, hold it by the spine, and wait until they say they have it before you let go. That last part is what prevents most handover accidents.
Close it. There is almost never a reason to pass an open folder, and closing removes the problem entirely. Hand it over closed and let the other person open it themselves.
If you must pass one open, treat it exactly like a fixed blade.
Hold the blade by its spine with the edge facing away from both people. Extend the handle toward them. Keep your grip until they confirm verbally or you can feel they have taken the weight.
Sheathe it instead if a sheath is available. A sheathed knife passed handle first is the safest version of this.
In workshops and kitchens the receiver says thank you or got it as the signal to release, and the passer holds on until they hear it. It sounds fussy and it is the single most effective habit here.
Silent handovers are where knives get dropped, and a dropped knife should never be caught. Let it fall and step back.