Offline QR Code Creation Guidelines

Below you can find the algorithm

A QR code must be generated by forming the following algorithm:

The portalURL take the following values

SoftOne Provider:

Demo: https://einvoice-demo-portal.s1ecos.gr/

Production: https://einvoice.s1ecos.gr/

IMPACT Provider:

Demo: https://einvoiceportaluat.impact.gr

Production: https://einvoice.impact.gr

{portalUrl}/TransmissionFailure with the following parameters (as query parameters):

IssuerTin is the VAT number of the issuer, including the country code prefix, i.e., EL111222333.

CustomerTin is the VAT number of the counterparty, including the counterparty code prefix, i.e., EL333222111. In the case of B2C, where the VAT is unknown, you must leave it blank.

CustomerName is the name of the counterparty, i.e., Demo Company.

InvoiceType is the invoice type code according to IAPR (ie 1.2).

Series is the fiscal series of the document, i.e., ΤΔΑ.

Number is the fiscal number of the document, i.e., 60.

DateIssued is the date the document is issued in the following format: yyyyMMddHHmmss, i.e., 20221231143059.

TotalAmount is the total amount of the invoice, i.e., 100.50.

TotalNetAmount is the total net amount of the invoice, i.e. 80.50.

TotalVatAmount is the total vat amount of the invoice, i.e., 24.58.

InternalId is the unique internal document ID, the identifier of the document. The same value is sent when posting the document in the DistributionDetails.InternalDocumentId field.

Signature is a unique string produced by the following algorithm:

The signature is generated by the following algorithm:
• Produce the following string:
{issuerTin}-{customerTin}-{series}-{number}-{dateIssued}-{totalAmount}-{internalId}{APIKey}
The values of the variables are identical to those mentioned above
i.e.: EL118058830-EL987654321-ΤΔΑ-123-20231010162042-124-1.2_ΤΔΑ_1230383223f-06ff4e7c-bd36-29a1acdb41b0
• Convert to UTF8 byte array.
• Hash the byte array using the SHA1 algorithm
• The signature is the generated byte array as a hexadecimal string (without delimiter)
i.e.: 92fea653224fd17d9b92a209f2cc9aacd300130f
Example of URL:
https://einvoice-demo-portal.s1ecos.gr/TransmissionFailure?issuerTin=EL118058830&customerTin=EL987654321&customerName=John&invoiceType=1.2&series=%CE%A4%CE%94%CE%91&number=123&dateIssued=20231010162042&totalAmount=124&totalNetAmount=100&totalVatAmount=24&internalId=1.2_%CE%A4%CE%94%CE%91_123&signature=92fea653224fd17d9b92a209f2cc9aacd300130f
The previous example URL leads to the page displayed until the document is sent

💡

The offline QR code is officially supported only for the provider. While it is technically supported for ERP e-invoice or documents that do not update MyData, the legalization of offline documents applies exclusively to provider-issued documents.

💡

The current implementation applies only to the transmission of invoices via a provider and does not cover cases of transmission through an ERP system.

Offline QR Code Instructions

Offline QR Code Creation Guidelines#

Offline QR Code Creation Guidelines