I want to know that what should be the package name of android app? Means normally we used com.appname OR com.organizationName.appName, But when we are submitting our application in to market then sometimes it shows the errors related to the package name that- Please change Package name. It should not be started with com etc..

I want to know why this happnes? And what should be Right the package name for android application?

If anyone knows the reason or answer of this question then please let me know.