I am not so sure these days! I have had 50 and 100 dollar bills with red ink stains, funky writing or symbols on them, and so on. Conceivably, if someone did that intentionally and was watching to see where these bills ended up, maybe they could. I have ordered many times from many places, and the only orders that did not show up were with cash. I had numerous cc orders (not recently) and no problems.i prefer to send cash as it is untraceable, ...