[Icelander]

It's used fairly frequently in my fantasy campaign where the PCs are merchant princes and condottieri.

The most memorable occasion occured when the PCs were collecting a sizable debt from a consortium of prosperous merchants on behalf of the estate of a deceased nobleman.

The merchants felt strongly that the lender's death rendered the huge loan null and void, unenforcable and uncollectable. That was, in fact, why they took such pains to have the nobleman killed, leaving only two daughters who would be unable to bring any meaningful action against them, either legally or through other means.

The PCs felt that buying the debt from the estate and collecting it was a mitzvah, a heroic deed of kindness and mercy that also served as a shrewd investment. Consequently, they strongly felt that the merchants ought to pay them the full value of the debt and considerable punitive damages, for the effort involved in collecting.

In order to collect payment, however, the PCs had to discover the various diversified holdings of the merchants in question, none of whom was naturally inclined toward disclosing the totality of his wealth to either authorities or potential rivals.

It thus happened that the PCs burgled the well-protected town house of a respected merchant, in order to break into his private study and discover the secret set of books he kept, in addition to the ones he'd show the authorities when forced.

While hanging suspended by his legs from the ceiling, in order to avoid stepping on floors enspelled to creak if stepped on, and using magical vision to read in near-perfect darkness, a PC with Accounting 24 (and Efficient: Accounting) went through the secret set of books at blazing speed*, pin-pointing through key omissions and references to coded payments that all the merchants in question were involved in an off-shore investment.

Very off-shore indeed, as it turned out, as it was a trade mission to the court of the kingdoms under the seas, populated by sea elves, mermen, tritons and stranger beings.

After that, it was just a matter of a few strategic assaults and batteries, a murder or two and a judicious amount of Intimidation backed up with pretended-omniscience, and the PCs walked away with a highly satisfactorily settlement that was several times more valuable than the original debt.

*We dubbed this Combat Accounting, as he was on a combat timescale from having snuck past a golem guardian earlier. The golem actually stood outside the door as the worked.