Preface: The only CBD that is federally legal is any that is 0.3% or less THC by volume. Distributors can not legally sell online to all 50 states unless the CBD product reaches those guidelines. Let's make sure we're clear on that. In the rare case that you aren't properly advised about your CBD intake, it is possible to perk a positive test for THC, even if your product reaches the 0.3% THC or less guideline. A friend of ours reached out, DESPERATELY, in search of answers.