If you buy an app from the Android Market to put on your cellphone or tablet, you do have return rights in some cases. This is helpful if the app does not work, is not compatible with your device, or it is not what you expected.
There is, however, a very unusual catch.
You have 15 minutes from the time of download to return an application [color highlighting added] purchased through Android Market for a full refund. You may only return a given application once; if you subsequently purchase the same app again, you may not return it a second time.
How to return an app:
From Android Market on your phone, visit the My apps page, and select the application you’d like to return.
•Applications that are eligible for return are marked with a ‘Uninstall & Refund’ button. Please note that after the 15 minute return period has expired, all sales are final.
From a practical standpoint, it is almost impossible to fully test some apps in such a short period of time, so your return rights are for the most part illusory. Even if you could fully test an app in 15 minutes, it might take that long to figure out the procedure to request a refund because you probably never paid attention to that when you first purchased the app.