# Easybill: sync customers, products and invoices

Connect Easybill.de to import customers, products, invoices and credit notes; optional document-payment write-back.

Connect **Easybill** so Cortena Accounts Receivable imports customers, products (positions), invoices, and credit notes. Optional payment write-back posts document payments back to Easybill.

**Who this is for:** AR teams that invoice in [Easybill.de](https://www.easybill.de) and want those documents in Cortena for open items, bank matching, and payment advice.

## 1. Connect Easybill

1. Open **Settings → Integrations → Billing → Easybill**.
2. Enter your Easybill API key and choose your plan tier (**plus** or **business**) so rate limits match your Easybill plan.
3. Save and confirm the integration is connected.

Ask Cortena Support if Easybill is not listed. Your workspace needs the Easybill integration feature enabled.

## 2. Sync domains

| Sync | What Cortena imports |
| --- | --- |
| **Customers** | Easybill customers |
| **Products** | Positions (product catalog) |
| **Invoices** | Non-draft invoices and credit notes |

Drafts in Easybill are skipped. Product GL uses Easybill export identifiers; line booking accounts map into Cortena line allocations.

### Invoices sync-from date

Set **Invoices sync from** (`YYYY-MM-DD`) so invoice sync only pulls documents on or after that date. Saving an earlier date than the last watermark clears the watermark so the next sync can backfill.

Use **Sync now** and watch live progress in Settings. Easybill can also push webhooks so Cortena re-syncs when documents change.

## 3. Optional payment write-back

When write-back is enabled (feature flag **and** the Settings toggle), payments applied in Cortena are sent to Easybill as **document payments**.

Leave write-back **off** if Easybill should remain the only place that records payments.

## Tips and limitations

- No Easybill bank account sync. Use Cortena Banking / payment advice flows after invoices are imported.
- Creating invoices *in* Easybill from Cortena drafts, and Easybill subscriptions, are out of scope.
- Related: [Accounts receivable](https://help.cortena.ai/guides/advanced/accounts-receivable), [Open items and payment write-back](https://help.cortena.ai/guides/advanced/open-items-write-back).

## Quick reference

| Task | Where |
| --- | --- |
| Connect / Sync | Settings → Integrations → Billing → Easybill |
| Sync-from date | Same card → Invoices sync from |
| Write-back | Same card toggle |