Most common CD would involve LE getting dressed up like your mail man and asking you to sign for your package followed about 5 seconds later with the silver bracelets getting slapped on. A lot depends on the size of the order though, it is not unheard of to allow a detected order through and then place you under surveillance then bust you later, I only know on one verifiable case of this happening in Australia though and I'm not sure if they would do it anywhere else.