| Drakenshield |
As mentioned already - this isn't a house rule. Recall Knowledge can be used to recognize pretty much anything. Including Haunts. This is just standard stuff
Actually there is no reference to using Recall Knowledge on hazards excluding Magical Hazards that I can find. So non-magical hazards including haunts are not assisted with Recall Knowledge rolls.
Based on the written rules once you perceive a hazard you can diable it, and under the "Disabling a Hazard" rules it lists off the standard skills a player would use. But makes no reference to how players can get the information required to know how to disable it if there are other options besides those listed. Simply succeeding at the perception check is all you need to also perceive how to disable it.
So Complex hazards in general require narrative assistance, and Complex Haunts more so than any other hazard requires extensive GM narration to guide the the players to disabling it. This is not a massive deal, but the issue is simply how poorly laid out Complex Haunts are that they require a GM to house rule how to deal with them. Sure multiple GM's might come to the same way of doing it, but the fact remains that their is no explicit rules on haunts.
If I an incorrect about the recall knowledge thing please show me, I would very much appreciate seeing the rules that I am missing, because I have searched extensively and maybe I am just looking in the wrong place, which to be honest with P2E it is really easy to do.