[somethingwitty1]

I understand what you are trying to get at, but the holding you described occurred after the interception (the turnover). So Team B can accept the penalty and would still have the ball.

A slight change of ordering makes your point. Team A drops back to pass and holds a Team B player going towards Team A QB. The QB then throws an interception. In that scenario, Team B would decline the holding penalty, upholding the interception.

[bena]

You can't commit holding on the ball carrier. It would have to occur before the catch, and in that case, it's offensive pass interference.

Regardless, your second example, of the offense committing holding and the defense declining due to an interception is legit. That happens occasionally.

[somethingwitty1]

The actual infraction isn't that important (I just interpreted they meant some infraction), but what is important is that they stated the foul happened after the interception, so it could not be OPI, as that must occur after the QB throws and before the player intercepts.

Edit: I think we just took what was more important for the OPs point differently. I took the point as a penalty occurred, not a specific one. And you see it as "how could holding have happened". Which, if we are being pedantic, also wouldn't happen in the scenario you described. If it was called holding, it would have had to occur before the pass, making it not OPI. =).