Here are some of the best practices for e-commerce merchants or merchants accepting card payments in a card-not-present environment. Bookmark this article and keep it handy to make sure you follow these guidelines and tips. 

1. Provide Detailed Product Descriptions: Provide clear and detailed product descriptions, including images and specifications, to avoid misunderstandings and customer complaints.
2. Display Pricing Clearly: Clearly display prices, including shipping and handling fees, taxes, and any additional charges, to avoid customer confusion and complaints.
3. Have a User-Friendly Website: Create a user-friendly website that is easy to navigate, with a clear checkout process and easy access to customer support.
4. Implement Fraud Detection Tools: Use fraud detection tools to prevent fraudulent transactions, including AVS and CVV verification, and implement velocity controls to limit high-volume transactions.
5. Use Secure Payment Gateways: Use secure payment gateways to protect customer information and prevent data breaches.
6. Set Clear Return Policies: Set clear and reasonable return policies and provide customers with easy-to-follow instructions for returns or exchanges.
7. Respond to Customer Inquiries Promptly: Respond to customer inquiries promptly and professionally to maintain a positive relationship and avoid disputes.
8. Monitor Customer Feedback: Monitor customer feedback, including reviews and social media comments, to address concerns and improve customer satisfaction.
9. Keep Accurate Records: Keep accurate records of all transactions and customer interactions to manage disputes effectively and provide evidence to support your case.
10. Stay Up to Date with Industry Regulations: Stay up to date with industry regulations and comply with card brand guidelines and consumer protection laws to avoid fines and legal issues.

By following these best practices, e-commerce merchants or merchants accepting card payments in a card-not-present environment can minimize customer disputes and complaints, maximize customer satisfaction and profitability, and build a strong reputation for their business.