Based on all your other posts, clearly you've been spending a lot of time with Banachek's effects. Indeed he is a top notch mentalist, but he has only ever published a small amount of his effects, and even these are mostly individual effects rather than general principles you can employ across many routines (such as billet work for instance). Since it sounds like you're starting out, I would strongly suggest building a strong foundation by reading a wide variety of sources.
To answer your question, I haven't seen him publish this particular effect, but if you spend some time learning about mentalism as a broad subject, you will undoubtedly learn exactly how he did this somewhere along the way...