Behind the scenes
- The card in which Gobb Lynn Security Specialists was mentioned was featured on the "Extra Stuff" section of J. K. Rowling's Official Site. It was removed from said section shortly after.
- This company's phone number was the combination needed to open the safe behind the secret door on Rowling's Official Site which revealed an excerpt from Harry Potter and the Half-Blood Prince.
- J. K. Rowling's Official Site (Mentioned only)
Notes and references
- ↑ Given that their advert included a telephone number it is very unlikely this was a wizarding company.