Who must keep one
Under the Slovenian Rules on the cellar register and accompanying documents for wine (Official Gazette 96/09), every producer listed in the register of grape and wine producers who must declare a wine harvest keeps a cellar register for the whole harvest. So do restaurants and bars serving wine that is not originally bottled. Producers registered only for growing grapes, or only for contract bottling, do not need one.
What the rules require
The register may be kept on paper or electronically, separately for each place of production, processing or storage. Every vessel must show its volume and an identification mark.
For every wine with its own ID in the register, the treatments carried out and the deliveries and dispatches are recorded separately; for grapes, the sugar content at harvest too. Entries are due within ten days of the treatment, receipt or dispatch, and must match the annual stock declaration.
The new Slovenian Wine Act (ZVin-1) applies from 14 March 2026. Before relying on the details, check the current text or ask your agricultural advisory service.
What to write down in the cellar
In practice: anything that changes the quantity or the make-up of the wine in a vessel.
- harvest: date, parcel, quantity and sugar content
- filling a vessel: vessel, volume, vintage and variety
- additions: substance, amount and date (SO₂, yeast, nutrients, fining agents)
- transfers and blends: from which vessel to which, and how much
- measurements: density, temperature, free and total SO₂, acidity, pH
- bottling: date, volume, number of bottles and lot
The cellar register in Kletio
Keep each vessel on its own: the fill at harvest, additions, transfers, fermentation readings and bottling with a lot number. Because everything is connected, the app keeps vessel volumes up to date and turns what you recorded into a cellar register PDF. It works in a cellar with no signal.
A plain-language summary, not legal advice. The current text of the regulations prevails.