Hi, it's me again, it seems that I solved my issue:
When I add my brother as a friend on Origin then on battlelog, it didn't work and I had that problem. But I removed him from my firend list on Origin and add him on battlelog. He received my invitation on Origin (but no notification on battlelog). When he accepted it, we were friend in Origin and in battlelog.
I don't know why it don't work if I add him on Origin first (and then in battlelog). But for me, it works if I add him on battlelog whithout having him already in my Origin contact list.
I hope you understant what I mean (English isn't my native language) and I hope it will help people with the same issue.
