Actually it was just an example. Since smart contracts in OT contain scripted clauses, this sort of logic is customizable. Therefore the market will be able to determine which contracts work best for which purposes. (And create the contracts they need.)

If it's completely impossible for Alice / Bob to verify whether a SEPA transfer has been successful, then reputation systems (I believe) will fill the gap. (Though I would think that Bob would have access to an API to verify whether he received the funds.)

For example, instead of routing your transfers through "any ole person" you might prefer to route them through a more trusted party, such as a "gateway" (to use the Ripple nomenclature) -- although in OT that would not be someone issuing credit, but rather, someone buying/selling coins or colored coins. Perhaps 'Jorg' is just one of such services. Also on OT, that Jorg will not be operating a server but rather, using one, just like any other user.

Perhaps someday soon, 'Jorg' will just be a bank himself.