What detail is essential to include in Header Information?

Including the merchant's business name in the header information is essential because it establishes a clear identity for the transaction. This detail ensures that customers and payment processors can easily recognize who the transaction is associated with, which is important for both branding and trust. A recognizable business name can help reduce confusion, aid in customer service inquiries, and contribute to a transparent transaction experience.

While other details like customer demographics, transaction history, and payment processing fees may be relevant for various purposes, they do not serve the pivotal function of immediate identification that the merchant's business name provides within the context of payment processing. Therefore, emphasizing the merchant's name in the header information enhances clarity and accountability for all parties involved in the transaction.