To set up a travel agency merchant account, travel agencies need to apply to a payment processor or acquiring bank that offers merchant services. The application process involves providing information about the business, such as its legal name, tax ID, and financial statements. The payment processor or acquiring bank will review the application and may request additional information before approving the merchant account.
Never pay down a deposit in a bank account until you have met the seller, seen signed a purchase agreement. No serious private advertisers ask for a down payment before you meet. Receiving an email with an in-scanned ID does not mean that you have identified the sender. You do this on the spot, when you sign a purchase agreement.