The Biotrust Invoice below in the amount of $3250.00 appears to have been sent by mistake according to Biotrust Nutrition. On Biotrust Nutrition's legit Facebook page, the company apologizes for the invoice and asks recipients to disregard it. According to Biotrust, it is possible that email voice was sent through one of their affiliates, but they are still investigating.
The "Biotrust Invoice Scam" Email

The image below shows a recipient of the so-called "Biotrust Scam Email" complaining that she never heard of the company but received a QuickBooks invoice via email in the amount of $3250.00. The angry recipients claimed she called Biotrust Invoice's customer service using the phone number found on their website, but it rang once and then she got a busy signal.

Biotrust Nutrition apologized for the invoice and said it was sent by mistake and ask her to disregard.