---
id: KB-NO-019
url: https://app.codecontract.io/help/regulation/when-your-waste-is-someone-elses-raw-material
idioma: en
categoria: normativa
subcategoria: residuos
audiencia: usuario
nivel: avanzado
actualizado: 2026-08-13
tambienEn: [es]
relacionados: [KB-NO-003, KB-IU-011]
citadoPor: [KB-IU-027]
---

# When your waste is someone else's raw material

_Selling what you used to pay to have removed is good business, and it changes entirely what you must be able to prove._

**Responde a:** selling production offcuts and scrap · my waste is another firm's raw material · by-product or waste difference · end of waste status

Steel offcuts, sawdust, clean production plastic, whey: material that for years went out of the door as waste and that someone is now willing to buy. The deal makes complete economic sense, and it also brings a change of regime worth understanding before signing.

## Three situations that look alike and are not

| Situation | What the material is | What is needed |
| --- | --- | --- |
| You hand it to an authorised manager | Waste | The usual waste traceability |
| You sell it to another firm as material | Still waste until proven otherwise | The relevant recognition, before selling it |
| It never became waste in your process | It may be a by-product | Proving it against criteria, not by agreement between parties |
| You give it away to get rid of it | Waste, all the same | Whoever takes it to be authorised |

> [!IMPORTANT]
> The second row causes the most trouble, and the mistake is always the same: **calling it raw material on an invoice does not make it raw material**. Until the relevant recognition exists, the material remains waste in the eyes of the regulator, with all its traceability — and whoever handed it over answers for what it was at that moment, not for what the buyer called it. An agreement between two companies does not change a material's nature; meeting the criteria does.

## What to obtain from the buyer before the first load

**En corto**

- Exactly what it is and in what condition it must leave your hands.
- That they can lawfully receive it in the condition you send it.
- Who transports it and under what authorisation.
- And what happens if a batch does not comply: they return it, they manage it, or it becomes your problem again.

> [!WARNING]
> The question almost nobody asks and that always comes up: **what happens when the buyer stops wanting the material?** A price change, a shutdown at their plant or a rejected batch, and suddenly you have something in the yard that nobody buys and that keeps being produced daily. Keeping the authorised-manager route alive — even unused — is what stops that week becoming a bigger problem than a year's savings.

## How it is documented while it lasts

1. **One file per material and per buyer** — With whatever evidences the condition it leaves in.
2. **Each delivery with its quantity, date and destination** — The same as you kept for waste: it does not relax because it is now sold.
3. **And any analyses or checks you run** — They are what supports each batch having complied.

> [!NOTE]
> When a material ceases to be waste, which status applies and what authorisations are needed is determined by the applicable waste rules and the competent authority. **Discuss this with your adviser before the first sale**, not after the first inspection; here we only explain why the conversation matters.

**Can I start selling while it is being processed?**

Ask first: handing it over as material without proof is the risk.

**What if the buyer says they have it covered?**

Have them show you: your responsibility is for what you hand over.

**Does the waste record still serve?**

It serves as a base, and it is worth continuing to keep it.

## Ejemplos

**A company starts selling its offcuts to a processor and stops keeping outbound records.**

- Keeps the per-batch record and checks in what condition the buyer may receive them

→ The sale remains good business and every load can be explained exactly as it left.

**What used to be taken away is now sold and nothing changes.**

- Reviews what documentation now accompanies each outbound movement

→ The movement is documented as what it is.

**The buyer asks for material characterisation.**

- Stores the analyses with the consignment

→ It is provided with the consignment rather than separately.

**Consignments of different grades get mixed.**

- Records what went into each output batch

→ You can say exactly what was sold.

**The buyer asks about a consignment from months ago.**

- Keeps a file for each outbound movement

→ You answer without reconstructing.

**It is sold to several buyers with different requirements.**

- Stores what was delivered to each

→ Each relationship has its own trail.