However, consent will have to be given if you would like your DNA used in comparison studies with other individuals. These databases are not accessible via the internet. No databases are 100 percent secure, but what helps is if the databases are either offline or on secure sites. The DNA and the DNA profile will never be sold or accessed by another party. Think about it for a minute.
Companies are in business, and they get their business by referrals.
If customers found out that companies sold their DNA data, the companies would not be in business very long. I would look for the company's privacy policy. State law may also regulate this area. The specimens as they arrive in the lab must be numbered. Very few people would actually know who the customer is and what the results are.