So, you can't explain why your pal is owed a credit he did not do due diligence in pursuing other than your feelings? Do I have that right? I mean, this is the entirety of what you have to say on the matter: Amen to that brother. One reason I bring this up is I've been friends with members of a national recording act for many years and have even gigged with a few of them in outside projects. They had several Top 40 hits and couple even made the Top Ten as well as three platinum selling albums. The hit songs were all written by one member many based around similar chords but each slanted a bit differently. Their producer whom I've also known for over 20 years was fairly instrumental in crafting their trademark sound from those tunes and separating them from the pack. Without a doubt though it was some outstanding guitar work from one member which pushed these songs forward. To this day he's only member of the original band to never have abandoned it in over 40 years and help sell those older tunes yet to this day none of the song writing royalties are his. I know it's a perfect world concept but somehow to me that just doesn't seem right. Whether or not your friend was a co-writer of this material has nothing to do with anything outside of the agreements he made with the folks he was working with who ultimately own the work. The time to claim ownership was when the work was created. If he did not assert his rights, that's no one's fault but his own.