Fortune / misfortune on flat checks

[SuperParkourio]

I ticked off one of my new players when I told him that flat checks are only affected by things that explicitly call out flat checks, so he couldn't reroll this attempt to target a hidden creature. Just today, though, I checked the rules for flat checks again.

Archives of Nethys: Flat Checks

Player Core Flat Checks wrote:

When the chance something will happen or fail to happen is based purely on chance, you’ll attempt a flat check. A flat check never includes any modifiers, bonuses, or penalties—you just roll a d20 and compare the result on the die to the DC. Only abilities that specifically apply to flat checks can change the checks’ DCs; most such effects affect only certain types of flat checks.

If more than one flat check would ever cause or prevent the same thing, just roll once and use the highest DC. In the rare circumstance that a flat check has a DC of 1 or lower, skip rolling; you automatically succeed. Conversely, if one ever has a DC of 21 or higher, you automatically fail.

Modifers, bonuses, penalties, and DCs that don't call out flat checks are all disqualified, but I don't see anything here about fortune or misfortune. Do fortune and misfortune affect flat checks then?

[Luke Styer]

I don’t see why they wouldn’t. I’ve allowed them in the past.

[Ascalaphus]

Yeah they're d20 checks, no problem using fortune on them.

I believe it was really intentional, many of these used to be d100% dice checks in 1E, they standardized them all to d20 checks in 2E so they'd connect smoothly with the rest of the game system.

The section you quote talks about DCs. You never have bonuses or penalties to flat checks; then they wouldn't be flat. But they are sometimes harder or easier, so the DC can be changed.

But a fortune reroll isn't any of those things, so not bothered by the restriction. Using hero points to reroll a flat check is pretty common at my table.

[shroudb]

I also allow them in my games. I see nothing different rerolling a miss due to concealment or a miss due to someone's armor.

[Baarogue]

If they're using a hero point to reroll a dying check, you might want to remind them that if they would die due to dying value they can spend all their hero points to automatically stabilize without raising their wounded value. Feelsbad to fail the dying flat check on a hero point reroll when that was your last hero point

[SuperParkourio]

I was in Foundry and the question occurred to me when a PC was rolling recovery checks while inside an Aura of Misfortune. Foundry allows misfortune to be used manually in this case, but doesn't recognize the recovery check as applicable automatically.

[YuriP]

They probably just didn't added the such automation to flat checks.
There's many things thats already automated in foundry module and many others that still not. They constantly are adding new automations to both the system module when releases a new version.

There are so many things that's not yet automatized that I have several modules to add extra automatic scripts like PF2e Workbench, PF2e Toolbelt, PF2e Flat Check, PF2e Perception (this one is very cool to deal with stealth and cover), PF2e Ranged Combat, PF2e Action Support, PF2e Reaction Checker, PF2e Staves, PF2e Target Damage. Yet there's still many things that I need to do manually (these automation modules yet helps me a lot, specially to not forget many things).