On eBay, whether sellers need to use Orange Union Payment depends on their business model and transaction volume. Orange Union Payment is a payment solution used to ensure the security and traceability of transactions. However, not all sellers need to use Orange Union Payment, especially for some small-scale sellers or sellers who only sell in the local market. They may choose to use other payment methods or conduct transactions directly with buyers.

In addition, some sellers may have established a good credibility and reputation, so they do not need to rely on Orange Union Payment to increase the credibility of transactions. In short, whether sellers use Orange Union Payment depends on their specific circumstances and business needs.