Greece FAQ

Frequently asked questions about invoicing compliance in Greece

How are Greek invoice types specified?

The Greek tax authority (IAPR) requires the invoice type to be specified as part of the invoice. In GOBL, this type can be set using the gr-mydata-invoice-type extension in the tax section and setting the GOBL invoice type to other.

Alternatively, GOBL will set the extension for you based on the type and the tax tags you set in your GOBL invoice. You can read more in the GOBL Greece Tax Regime readme.

If you produce a PDF version of the invoice, the invoice type label will be displayed instead of “Invoice”.

What invoice types are available for myDATA?

Greece’s myDATA system uses a detailed set of invoice type codes that classify every transaction reported to the tax authority (IAPR). Each type has a numeric code (like 1.1 or 11.1) and describes the nature of the transaction — whether it’s a standard sale, a service, a credit note, a retail receipt, and so on.

When using GOBL, many of these types are assigned automatically based on the invoice type and tags you set. For the rest, you can set the gr-mydata-invoice-type extension directly in the tax section of your invoice, using type other.

Sales Invoices (1.x)

Code	Description	GOBL Type	Tags
1.1	Sales Invoice	standard	goods
1.2	Sales Invoice / Intra-community Supplies	standard	goods, export, eu
1.3	Sales Invoice / Third Country Supplies	standard	goods, export
1.4	Sales Invoice / Sale on Behalf of Third Parties	standard	goods, self-billed
1.5	Sales Invoice / Clearance of Sales on Behalf of Third Parties – Fees from Sales on Behalf of Third Parties	other	—
1.6	Sales Invoice / Supplemental Accounting Source Document	other	—

Service Invoices (2.x)

Code	Description	GOBL Type	Tags
2.1	Service Rendered Invoice	standard	(default) or services
2.2	Intra-community Service Rendered Invoice	standard	services, export, eu
2.3	Third Country Service Rendered Invoice	standard	services, export
2.4	Service Rendered Invoice / Supplemental Accounting Source Document	other	—

Proof of Expenditure (3.x)

Code	Description	GOBL Type	Tags
3.1	Proof of Expenditure (non-liable Issuer)	other	—
3.2	Proof of Expenditure (denial of issuance by liable Issuer)	other	—

Credit Invoices (5.x)

Code	Description	GOBL Type	Tags
5.1	Credit Invoice / Associated	credit-note	—
5.2	Credit Invoice / Non-Associated	other	—

Self-Delivery / Self-Supply (6.x)

Code	Description	GOBL Type	Tags
6.1	Self-Delivery Record	other	—
6.2	Self-Supply Record	other	—

Contracts & Rents – Income (7.x, 8.x)

Code	Description	GOBL Type	Tags
7.1	Contract – Income	other	—
8.1	Rents – Income	other	—
8.2	Special Record – Accommodation Tax Collection/Payment Receipt	other	—

Retail / Simplified (11.x)

Code	Description	GOBL Type	Tags
11.1	Retail Sales Receipt (ΑΛΠ)	standard	goods, simplified
11.2	Service Rendered Receipt (ΑΠΥ)	standard	services, simplified
11.3	Simplified Invoice	standard	simplified
11.4	Retail Sales Credit Note	credit-note	simplified
11.5	Retail Sales Receipt on Behalf of Third Parties	credit-note	goods, simplified, self-billed

Expense / Purchase Records (13.x)

Code	Description	GOBL Type	Tags
13.1	Expenses – Domestic/Foreign Retail Transaction Purchases	other	—
13.2	Domestic/Foreign Retail Transaction Provision	other	—
13.3	Shared Utility Bills	other	—
13.4	Subscriptions	other	—
13.30	Self-Declared Entity Accounting Source Documents (Dynamic)	other	—
13.31	Domestic/Foreign Retail Sales Credit Note	other	—

Purchase Invoices (14.x)

Code	Description	GOBL Type	Tags
14.1	Invoice / Intra-community Acquisitions	other	—
14.2	Invoice / Third Country Acquisitions	other	—
14.3	Invoice / Intra-community Services Receipt	other	—
14.4	Invoice / Third Country Services Receipt	other	—
14.5	EFKA (Social Insurance)	other	—
14.30	Self-Declared Entity Accounting Source Documents (Dynamic)	other	—
14.31	Domestic/Foreign Credit Note	other	—

Contracts & Rents – Expense (15.x, 16.x)

Code	Description	GOBL Type	Tags
15.1	Contract – Expense	other	—
16.1	Rent – Expense	other	—

Accounting Entries (17.x)

Code	Description	GOBL Type	Tags
17.1	Payroll	other	—
17.2	Amortisations	other	—
17.3	Other Income Adjustment/Regularisation Entries – Accounting Base	other	—
17.4	Other Income Adjustment/Regularisation Entries – Tax Base	other	—
17.5	Other Expense Adjustment/Regularisation Entries – Accounting Base	other	—
17.6	Other Expense Adjustment/Regularisation Entries – Tax Base	other	—

Where can I find the mapping of GOBL fields to myDATA?

For further details on how GOBL prepares data for conversion, see the Greek Tax Regime.

What if my business already uses another myDATA provider?

Greek regulation does not allow two myDATA providers to operate simultaneously for the same VAT number. If your business currently uses a different provider, you will need to switch to Invopop’s provider (ILYDA) before issuing invoices through the platform.

The regulatory restriction applies to simultaneous use of multiple providers, not to changing from one to another. See the supplier registration section in our Greece guide for details on the onboarding process, or contact us via Slack or [e-mail].

Why is my credit note being rejected with 'Invoice not found' error?

If you issue a credit note shortly after the invoice it refers to, the MyDATA system may reject it because the original invoice hasn’t completed synchronization. You’ll typically see an error like:

Fatal error 301: Invoice with ΜΑΡΚ xxxx not found for VAT number xxxx

This happens because there can be a delay between when an invoice is accepted by MyDATA and when it becomes fully available for reference by other documents like credit notes. This delay can range from a few minutes to several hours, depending on MyDATA system load.

Solution: If you receive this error, retry issuing the credit note after waiting some time. You may need to wait anywhere from a few minutes to several hours for the original invoice to be fully synchronized in the MyDATA system before the credit note can successfully reference it.

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