How can I verify a company is legitimate?

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Tags

1. #untrustworthy
2. #phone
3. #number
4. #address
5. #listed
6. #reviews
7. #clients
8. #company
9. #website
10. #online
11. #doesn
12. #saying
13. #people
14. #customers
15. #checking
16. #check
17. #legitimate
18. #genuine
19. #other