Cannot remove an update request in Mac App Store

Question

A friend used my macbook pro to purchase an app. I no longer wanted that app and deleted it.  However, the Mac App Store keeps asking me to update the app and when I click on 'update' it asks for my friend's App Store ID.  I would like to remove this update request so I can get back to using update all.
Anyone know which file on my Mac holds these requests?

Answer 1

Any ideas on what that file is called?
Yes, it's called a pirated app. Most of the times that folks see an update for Angry Birds and an Apple ID of someone else, it means that they have a pirated app. Angry Birds is not on their Mac, but someone has cracked an app that is sold in the Mac App Store (MAS) with the MAS-receipt from the free Angry Birds app.
This is the method that I came up with last year when pirated apps first started showing up after the advent of the MAS.
Finding a pirated app -
When a stranger's Apple ID appears on your Mac in conjunction with an update for an app that you have never installed, you have a pirated app on your Mac. This pirated app has been cracked with the MAS receipt from the Angry Birds app acquired by the person whose Apple ID you see.
You may not have realized that it was a pirated app when you installed it. You may have believed that it was a trail version or a "free" version.
All MAS apps have a MAS receipt in their app bundle. Check any app acquired from the MAS. Right click on the app's icon in your Apps folder and choose Show package contents. In the Contents folder is a _MASReceipt folder and in that folder is the coded MAS receipt. It has the Apple ID of the MAS account that bought/acquired the app from the MAS. It is that receipt that the MAS uses to alert you that an app has an update. There would not be a notice of an update with someone else's Apple ID showing in the MAS on your Mac, if there was not an app with a receipt from this person's account somewhere on your Mac.
Download the free app FindAnyFile (FAF);
http://apps.tempel.org/FindAnyFile/
This app is easier to use and seems to be more powerful than Spotlight. Open FAF and in the box type _MASReceipt and press Find. It should come up with a list of every app on the Mac with a MAS receipt. Compare the apps with receipts in FAF's list with your purchased apps list in the Mac App Store. The odd app out should be the pirated app.