Commentaries: Art. 1052

To the extent that the drawer of a bill of exchange and the acceptor are unjustly enriched to the detriment of the holder, they remain obliged to the holder even where their bill liability has prescribed or extinguished on account of failure to take the actions required by law to sustain the entitlement under the bill of exchange.
The claim for unjust enrichment also exists against the drawee, the domiciliate and the person or company for whose account the drawer issued the bill.
By contrast, no such claim exists against the endorsers whose bill liability is extinguished.

Art. 1052