Mariana, the owner, was the sort of person who remembered birthdays and tax codes in equal measure. She ran Potogas with a kindness that bordered on stubbornness. When the new facturación system rolled out, Mariana stayed up nights reading PDFs, calling helplines, and printing practice invoices for her cat. She refused to let her customers leave without correct paperwork; for many, having a verified factura meant more than a receipt—it was dignity, proof that their daily purchases were counted and respected.