I have created an application for my customer. We have published the application with my account. Now, they want to change the developer name as their company's name. Is there a way to change the developer name? Can I move my application to their business account so that Developer name changes to their business name?
Yes, you can transfer the app to other since WWDC 2013. Also, you can call the Apple Support to change the Seller Name. Here is a video about this: App Transfer Tutorial.