16 Dec Spanish Hoja de Reclamaciones (Complaints Sheet). Is it of any use?
Yes in general terms, and to an extent you probably do not even expect.
The law requires that all businesses keep this official complaint sheet and they are forced to bring it when a customer asks for it. One of the copies you sign is to be presented at the local Consumer’s Municipal Information Office (Oficina Municipal de Información al Consumidor (OMIC)), and the establishment can be fined if it fails to accomplish this.
The establishment must reply to a client’s complaint within a term of 10 days and if it does not, the client can have his case seen at the OMIC while the establishment can face fines up to €6,000.