If you search on the "cone method" you'll find many discussions on it. Or try searching on "feral bees"
Here's my 2 cents.
Cone Method
This method is used when its impractical to tear into a hive and remove the comb or there are so many bees you dont want to face them all at once. This is a method where a screen wire cone is placed over the main entrance of the current home of the bees. All other entrances are are blocked with screen wire stapled over them. Make the end of the cone so it has some frayed wires so that a bee can push the wires enough to get out (including drones and queens) but cant get back in. Aim it a bit up and it helps some on keeping them from finding the entrance. Now you put a hive that has just a frame of open brood, a couple of frames of emerging brood and some honey/pollen, right next to the hive. You may need to build a stand or something to get it close to where the returning foragers are clustered on the cone. Sometimes they will move into the box with the brood comb. Sometimes they just hang on the cone. The biggest problem Ive had is that this causes many more bees to be looking for a way in and circling in the air and the homeowners often get antsy and spray the bees with insecticide because they are afraid of them. If you think this is a problem then, DONT put the box with the brood here, but rather at your beeyard, hopefully at least 2 miles away, and you vacuum or brush the bees off into a box every night and take them and dump them in the box with the brood, you will eventually depopulate the hive. If you keep it up until no substantial number of bees are in it anymore, you can use some sulfur in a smoker to kill the bees (sulfur smoke is fatal but does not leave a poisonous residue) or some bee quick to drive the rest of them out of the tree (or house or whatever). And if you use the Beequick you may even get the queen to come out. If you do, catch her with a hair clip queen catcher and put her in a box and let the bees move into the box. Since the cone is still on the entrance they cant get back in the old hive. Id leave it like this for a few days and then bring a strong hive and put it close to the old hive. Remove the cone and put some honey on the entrance to entice the bees to rob it. This is most effective during a dearth. Mid summer and late fall being likely dearths. Once they start robbing it, they will rob the entire hive out. This is especially important if removing them from a house, so that the wax doesnt melt and honey go everywhere or the honey attract mice and other pests. Now you can seal it up as best you can. The expanding polyurethane foam you buy in a can at the hardware store is not too bad for sealing the opening. It will go in and expand and make a fairly good barrier.