send a confirmation letter to the sender thanking them. then open the package, and start processing the cutting. i typically cut the top as far away from the node that i want the branches to come out as possible. i cut the bottom as close to the bottom node as possible. i wash and scrub them in anti bacterial soap and depends on how i feel that day, might soak in bleach solution.
wrap them in the paper towel, viva paper towel, and put in 1 gal ziploc, freezer bag. mark the bag.
check on the cuttings each day. wipe away any mold and excess moisture.