Guarantees of Origin: Complete Guide to Temporal Matching, Expiry & Lifetime Rules Per Country in 2026

Guarantees of Origin (GOs) are the standardised European instrument for tracking renewable electricity across the continent, but the rules governing their validity are far from uniform.

A GO issued in France operates under quite different temporal constraints than a GO issued in Ireland or the Netherlands, but the difference only becomes truly apparent at cancellation time. For any sustainability team procuring or managing certificates across borders, getting this right is what ensures a compliant portfolio and an audit-ready scope 2 emissions report .

This guide breaks down the fundamentals of GO lifetimes, temporal matching and expiry at the registry level (note that private standards such as RE100, the GHG Protocol, or regime-level variations of GHG reporting can and do impose additional temporal requirements). We'll also be providing an overview of the country-level variations that make cross-border certificate management a genuinely complicated operational undertaking. For an introduction to matching altogether, please see our guide to temporal and geographic matching .

How Long Are Guarantees of Origin Valid, and When Do They Expire?

The baseline rule to remember is that a GO remains tradable for 12 months after the end of its production period, and this rule applies across most AIB member states. After that window closes, the GO is expired at the registry level and can no longer be transferred or, in many jurisdictions, cancelled.

The 12-month tradability limit is enforced by the registry where the GO is held, but cancellation treatment is not uniform. In many markets, transfer and cancellation both close at 12 months. In others, the certificate can no longer be traded after 12 months but can still be cancelled for a limited grace period. Hungary, Germany and Estonia allow cancellation up to 18 months after production, six months after the end of the trading period. Austria, Flanders, Cyprus, Ireland, Lithuania, Poland, Portugal and Slovenia also have 18-month cancellation or expiry mechanics of some kind, and Italy permits cancellation for an extra six months beyond the transfer window, capped at 31 March of year n+2. These differences carry very real consequences for procurement timing.

The comparison below sets out how these lifetime and expiry rules apply across the reviewed markets. Note that for electricity suppliers, variations in disclosure deadlines complicate this issue further. See our short article on the topic here. Most countries enforce a 31 March cancellation cut-off for the prior year's consumption.

Do Guarantees of Origin Require Temporal Matching Between Production and Consumption?

Temporal matching is the requirement that a GO's production period aligns with the consumption that it evidences at the point of cancellation. A small number of geographies apply annual or monthly matching, while many reviewed markets impose no explicit production-consumption matching rule beyond certificate lifetime and disclosure timing. Assuming that a single procurement strategy can simply abide by a uniform set of rules here is, quite often, the type of consequential planning error a compliance function will make only once. The table below provides the full country-by-country breakdown.

How Do Private Standards Add Another Layer to This Topic?

Whilst not this article's focus, we think most readers will value this clarification. We've so far just outlined the technical and legal limitations that the registries themselves enforce, but private standards add additional rulings that, if you wish to retire EACs in accordance with their ruleset, you must follow.

• RE100 determines that: The period of generation used to claim use of renewable electricity must be reasonably close in time to the period over which a claim to use of renewable electricity is made. RE100 does not define "reasonably close"; for more on that ambiguity, see our glossary entry on reasonably close to the reporting year .
• The GHG Protocol 's Scope 2 quality criteria for market-based instruments determines that consumption should be redeemed as close as possible to the period of energy consumption to which the instrument is applied . However, ongoing discussions exist around a potential revision to the GHG Protocol that, if enacted, could see a mandatory shift towards hourly matching and/or the use of T-EACs.

There's No Need to Do This All Manually...

It's natural to feel that this is a little daunting. Navigating 30+ sets of lifetime, expiry and temporal matching rules from a spreadsheet is possibly doable for a small portfolio. But to do it reliably at scale, with audit-ready documentation across ever-tightening reporting cycles, is another type of challenge altogether. Soldera is a unified platform that connects to every major European registry from a single place, giving certificate managers the ability to procure directly from producers, manage cancellations across jurisdictions with different rules and generate verified cancellation statements for every location. Considering European rules are ever-changing for renewable consumption, the infrastructure handling compliant procurement needs to be adaptable and automated. Let Soldera ease the burden.