The best one there is the bit about "Wizard's Sigils" from Rival Magic -- but all of the examples we have are from the Magic realm, and have to do with the Gift. I am not sure there are Faerie, Divine, or Infernal sigils.
Maybe 'sigils' are a Magical realm phenomenon, and not a general feature of supernatural activity.
I must admit that I was surprised not to be able to find much in the realm books. To me, a demon leaving its mark is quite thematic. The Hand of God (Angels and such) have a history of Sigils allowing to know which Angel is responsible for what.
The Jinns, irrespective of their realm, do taint the magic of the Sahir and leave their "Sigils"
Bound Spirits, irrespective of their realm (Not clarified/specific) manifest minor effects similar to a sigil.
But ya, I agree the literature is focused on characters having the gift leaving a Sigil behind.
W
I think your demonstration the sigil is non-hermetic is good enough. If a wizard wanted to develop an equivalent to siggt of the sigil to analyze faerie effects, I'd allow it. Potentially, anything unique enough to have its own name / true name might have one.
Thanks for the comprehensive list, that's very impressive!
It's already been noted that most examples are of Gifted people using some supernatural power or creating a magical effect.
While the Parma Magica is technically an Arcane Ability, not a Supernatural Ability, it seems reasonable to treat it the same. So you convinced me that the Parma can manifest a sigil. I guess it won't come up a lot, because there is little reason to investigate someone's Parma, and maybe that's why it's not talked about.
I'm still not convinced about magic items, familiar bonds or talisman bonds. Those don't feel like active effects.
As for other realms, I would have expected some clear statements if sigils were the norm there. Both your examples are in relation to magic, maybe that plays a role? At least the door os not closed on that.