Li Shenron
Legend
So, if detecting a seam in the wall (where a secret door is) requires a DC 15 passive Perception, and your player is actively checking and therefore they roll a 2 (+5) for a total of 7, but their passive is 15, then they detect it anyway.
Now, if the DM calls for a WIS (Perception) check because the outcome of such efforts is uncertain then the DM ought to take your passive score into account and award auto-success if it's high enough to beat the DC for the check.
No way. This may be how YOU like handling Perception, but nowhere in the rules it is said that the DM must do it like this.