A merchant ID is an identification number connected with a business, which tells the payment processing system of transactions where to send the money. To receive a merchant identification number you have to work with an acquiring bank through a merchant service provider. Read more about how do I find my Merchant ID-
A PayPal merchant account is an online payment receiver for business owners and entrepreneurs to receive payments from customers.
To get a merchant account you have to fulfill some basic PayPal merchant account requirements such as your Email, business information, your details, and a bank account.
It is an agreement between a merchant and an acquiring bank.
By this agreement a merchant can process online transactions and accept debit and credit card payments.
But for all this you have to require a merchant account set up.
When a merchant opens his account with an acquiring bank he receives a MID number.
You have to verify your business to get a Merchant ID number.
This involves documentation like Taxpayer Identification Number, name of owners and other relevant information.
Read more about what is merchant ID number-
To open a high-risk merchant account you need to find an acquiring bank that will underwrite your business.
However, to increase your chances of getting an account, ask a reliable payment service provider for assistance.