PDO, PGI and TSG appear on cheese, olive oil, ham, cured meats and many other European foods, but they do not mean the same thing and they are not a ranking from “best” to “worst”. They are regulated quality schemes protecting registered names and defined production rules. Understanding the difference helps avoid two common mistakes: assuming every traditional product has a geographical indication, and assuming one label guarantees an identical flavour from every producer.

Quick guide: what each abbreviation means

The exact legal wording depends on the applicable EU rules and product specification. The useful distinction is that PDO and PGI are geographical indications, while TSG protects tradition.

What a PDO protects

PDO means Protected Designation of Origin. The registered name identifies a product with a strong connection to a defined place and specification. The specification may set out the geographical area, authorised raw materials, breeds or varieties where relevant, processing, maturation, controls and product characteristics.

This does not make every product within one PDO taste identical. Producers can still differ in raw material, harvest, ageing, curing time or house style within the common rules. A PDO defines what must be respected; it does not reduce flavour to one formula.

What a PGI protects

PGI means Protected Geographical Indication. It also protects a name connected with a place, but the required production link is different from a PDO. Broadly, at least one relevant stage must be linked to the area and a quality, reputation or other characteristic must be attributable to the geographical origin.

That is why PDO should not be read as “higher quality” and PGI as “lower quality”. They are different legal models for linking a product name with a place.

What a TSG protects

TSG means Traditional Speciality Guaranteed. The core idea is tradition: a recognised recipe, composition or method of production. Unlike PDO and PGI, it does not require the food to come from one specific region. Protection centres on the registered traditional characteristics.

The logo does not replace the registered name

When buying, do not rely only on recognising a coloured EU symbol. Read the full registered name. Expressions such as “style”, “type”, “traditional” or a geographical reference in a brand name do not automatically create PDO, PGI or TSG status.

How to verify a protected name

1. Look for the full protected name, not merely a place reference.
2. Check the EU logo where applicable and any official certification identifiers.
3. Use the official EU register if a name is unclear.
4. Read the rest of the label: a quality scheme does not replace category, ingredients, producer or format information.

Examples across Spanish foods

You can apply this framework to our guide to Spanish PDO cheeses, Iberian ham PDO guide and olive-oil PDO guide. Those guides focus on what the individual registered names protect rather than repeating the general legal distinction.

PDO does not automatically mean artisan, organic or acorn-fed

These are separate concepts. A geographical indication protects a registered name under a specification; organic production follows different rules; artisan terminology depends on context and applicable law; and acorn-fed or grain-fed categories belong to the specific Iberian system. They may coexist on one product, but one term does not automatically imply the others.

The useful takeaway

When you see PDO or PGI, think first about the link between a registered name, a place and a specification. When you see TSG, think about a traditional composition or method. Then compare the details that matter for the actual product: raw material, producer, processing, maturation or harvest and the style you want.

Official source

• European Commission: geographical indications and quality schemes.