We use pattern recognition and search for keywords in your email metadata to determine if you have an account with a company. A simplified example would be: You have received multiple emails from a business, one of which contains the subject line ‘Thank you for registering’. Based off of the multiple factors and data points we calculate the likelihood of you having an account with a business. You should know, if you have deleted all the emails you have received from a company, we will not be able to understand your relationship with that company.