Bad call by a Junior Ref..
 

We had a game last week. A teammate of mine got called for travelling by a ref near the action (baseline), while he was contesting the call, the Senior Ref (who was in the middle) reversed it and called a foul on the defender. Is there a rule saying that a Senior ref can overule a call ? Thanks ! :)

I would wager that the other ref saw a foul caused the travel which his partner called. In this situation the other ref can come in and say "I had a foul first" and that would be the call. Not necessarily an "overrule".

This.

Ideally, the primary official (the lead, aka "the guy on the baseline") would see the foul and call that instead of the traveling violation that was caused by the foul, but sometimes that just doesn't happen for any number of reasons.

I'm sure you know this already, but you need to be VERY careful when you do this.

Also, this doesn't mean it was a bad call by the junior ref.

We have responsibilities and areas. There is no such thing as junior ref or senior ref. We are the same when we are out there. If you mean "junior" by years of experience or some kind of ability, well when we are out there we are the same. It is possible that the official that made the call saw the entire thing clearly and made a ruling. Nothing about that suggests someone was overruled. We do not overrule each other, we get the call right or that is the goal. So what happened first is what we try to do. We all are not looking at the same things either.

Peace

How do you know which was the "senior ref" and which the "junior ref"?