Why would they be Qeynos anything faction? It's 90% likely to be coalition of tradefolk, 10% chance to be coalition of tradefolk illegal (which would make no sense in NFP).
I heard
inert potion quest in Erudin was good for this.
Your faction standing with Coalition of Tradefolk Underground got better.
Your faction standing with Coalition of Tradefolk got better.
Your faction standing with Carson McCabe got better.
Your faction standing with Corrupt Qeynos Guards got better.
Your faction standing with The Freeport Militia got better.