Borrow a cat trap(large havahart) from the animal control officer and bait the feral cat into it. Then take to animal control for disposal.
I just set the trap out a little while ago. FWIW, it's not a feral cat, when I went to the door wall with a flashlight and hit the window to try and scare it away, it just sat there looking at me......LOL! No, it was a healthy and nice looking cat that definitely belongs to someone.
How Christian.
Borrow a trap from the nearest rescue or spay and release program. Once caught, take it to them and they’ll spay the kitteh and try to find a home for it.
Or do what I do. Grab the kitteh. Keep him isolated from you’re kitteh. Take him to the vet to see if he’s fixed or has a chip as well as healthy. If not, get both. Bring home kitteh and add to your collection.