No merchant account provider will open a new account without the personal social security numbers of the principals. Otherwise you could defraud one bank then the next your whole life by simply forming a new LLC/corp each time for $100 a pop.
When a merchant is terminated for fraud, breach of contract or excessive chargebacks, they can be placed on the TMF (Terminated Merchant File) and MATCH (Member Alert to High-Risk Merchants) lists which all Visa/MC member banks have access to. The social security numbers of all the principals are added to that list, so that if they apply with a new business somewhere else, the bank knows they've previously been a principal of a business some other bank terminated, and the reason.
When a merchant is terminated for fraud, breach of contract or excessive chargebacks, they can be placed on the TMF (Terminated Merchant File) and MATCH (Member Alert to High-Risk Merchants) lists which all Visa/MC member banks have access to. The social security numbers of all the principals are added to that list, so that if they apply with a new business somewhere else, the bank knows they've previously been a principal of a business some other bank terminated, and the reason.