Any way to make a secret door undetectable?

[Chernobyl]

Is it possible within the rules (not GM fiat) to make a secret door undetectable via normal methods, such that it can only be found by use of magical means (e.g. Detect Secret Doors, True Seeing)?

Thanks!

[Temotei]

You could just put some mundane crap (books, shelves, walls, rubble, etc.) in the way of the door so that nobody can get in range for their racial abilities.

Or you could get creative with some spells. Make walls out of shadow conjuration and its greater version, use illusory walls, wall of ice to prevent people from getting close to the secret but still allowing sight through...

You could probably do something silly with an illusory secret door leading to a room with the real secret door.

[Hugh Mann]

If you really want to get fancy and stretch the definition of a door, you could have some sort of greater spell glyph linked to a passwall spell. Then all you have to do is make the glyph invisible. If you classify the thing as a trap then you could make the spell automatically reset itself.

That way the only method of even knowing the door exists is a way to detect magic or see invsible things.

[Zanos]

A hallway with an illusory wall in front of it technically isn't a secret door.

[Mutazoia]

Cover your secret door with a real wall....

[KillingAScarab]

Since the perception skill sets the DC to "find the average secret door" at 20 and the best DC modifier is +20 for invisibility, first, kill everything within sight radius of the secret door...

[Celestia]

Some spackle aught to do it.

[Deophaun]

Make your fortress/lair/dungeon out of secret doors and mark the ones you want with magic aura. Drive the elves insane.

Use trained mimics with the Darkstalker feat instead of doors.

Turn the doors ethereal. They won't function so well as doors, but good luck finding them.

[johnbragg]

Is there a reason you want to punish your players for wasting skill ranks in Perception?

At least make it a resettable trap of Suggestion, "Ignore this door".

[Jack_Simth]

Make it a Phase Door (http://paizo.com/pathfinderRPG/prd/coreRulebook/spells/phaseDoor.html) spell, rather than a standard door.