Amazon
If the account is used for Amazon, the account name should be same as Amazon's legal business name, you can find the legal business name via below steps:
Step 1
Login the Amazon seller central, below is the links:
Amazon seller central – North America: https://sellercentral.amazon.com
Amazon seller central - Europe: https://sellercentral-europe.amazon.com/
Step 2
Click Setting -> Legal Entity
Step 3
You can find the Legal business name
PayPal
If the account is used for PayPal, the account name should be same as PayPal's business information, you can login your PayPal and find the business information as below:
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