# eINVOICING

## Docs
- eInvoicing Service [About Us](https://developers.s1ecos.com/about-us-807416m0.md): 
- eInvoicing Service [What We Offer](https://developers.s1ecos.com/what-we-offer-853818m0.md): 
- eInvoicing Service [FAQ](https://developers.s1ecos.com/faq-869852m0.md): 
- eInvoicing Service [Change Logs](https://developers.s1ecos.com/change-logs-869853m0.md): 
- eInvoicing Service [On Boarding](https://developers.s1ecos.com/on-boarding-870887m0.md): 
- eInvoicing Service > eInvoicing Service API [Service Endpoints & Network Details ](https://developers.s1ecos.com/service-endpoints-network-details-882202m0.md): 
- eInvoicing Service > eInvoicing Service API [API Authentication](https://developers.s1ecos.com/api-authentication-3187997f0.md): 
- eInvoicing Service > eInvoicing Service API > API Authentication [API Key Authentication](https://developers.s1ecos.com/api-key-authentication-3188004f0.md): 
- eInvoicing Service > eInvoicing Service API > API Authentication [Bearer Token Authentication](https://developers.s1ecos.com/bearer-token-authentication-3188008f0.md): 
- eInvoicing Service > eInvoicing Service API > API Authentication > Single Sign-On (SSO) [Single Sign-on (SSO) Setup Instructions](https://developers.s1ecos.com/single-sign-on-sso-setup-instructions-871290m0.md): 
- eInvoicing Service > eInvoicing Service API > API Endpoints [Sending Invoice Via Mobile](https://developers.s1ecos.com/sending-invoice-via-mobile-880816m0.md): 
- eInvoicing Service > eInvoicing Service API > API Endpoints [Purchase Orders for F&B](https://developers.s1ecos.com/purchase-orders-for-fb-3188025f0.md): 
- eInvoicing Service > eInvoicing Service API > API Endpoints > Purchase Orders for F&B [FnB Purchase Orders Documentation](https://developers.s1ecos.com/fnb-purchase-orders-documentation-871313m0.md): 
- eInvoicing Service > eInvoicing Service API > API Endpoints [Document Management](https://developers.s1ecos.com/document-management-3188015f0.md): 
- eInvoicing Service > eInvoicing Service API > API Endpoints > Document Management [Retrieving a document](https://developers.s1ecos.com/retrieving-a-document-869812m0.md): 
- eInvoicing Service > eInvoicing Service API > API Endpoints > Document Management [PDF Invoice Attachment](https://developers.s1ecos.com/pdf-invoice-attachment-871025m0.md): 
- eInvoicing Service > eInvoicing Service API > API Endpoints [Sending a Document](https://developers.s1ecos.com/sending-a-document-3195254f0.md): 
- eInvoicing Service > eInvoicing Service API > API Endpoints > Sending a Document [Sending a Document](https://developers.s1ecos.com/sending-a-document-871085m0.md): 
- eInvoicing Service > eInvoicing Service API > API Endpoints > Sending a Document [Mandatory Fields B2C, B2B](https://developers.s1ecos.com/mandatory-fields-b2c-b2b-929843m0.md): 
- eInvoicing Service > eInvoicing Service API > API Endpoints [Alternative Currency Holding](https://developers.s1ecos.com/alternative-currency-holding-3188020f0.md): 
- eInvoicing Service > eInvoicing Service API > API Endpoints > Alternative Currency Holding [ALTERNATIVE CURRENCY (AC)](https://developers.s1ecos.com/alternative-currency-ac-871291m0.md): 
- eInvoicing Service > eInvoicing Service API > API Endpoints [Delivery Notes](https://developers.s1ecos.com/delivery-notes-3188021f0.md): 
- eInvoicing Service > eInvoicing Service API > API Endpoints > Delivery Notes [Delivery Notes Documentation](https://developers.s1ecos.com/delivery-notes-documentation-871309m0.md): 
- eInvoicing Service > eInvoicing Service API > API Endpoints [POS Integration](https://developers.s1ecos.com/pos-integration-3188024f0.md): 
- eInvoicing Service > eInvoicing Service API > API Endpoints > POS Integration [POS Integration ](https://developers.s1ecos.com/pos-integration-871310m0.md): 
- eInvoicing Service > eInvoicing Service API > API Endpoints > Delayed POS Payment [Delayed POS Payment](https://developers.s1ecos.com/delayed-pos-payment-950993m0.md): 
- eInvoicing Service > eInvoicing Service API > API Endpoints > B2G Documents [B2G Documents](https://developers.s1ecos.com/b2g-documents-869819m0.md): 
- eInvoicing Service > eInvoicing Service API > API Endpoints > B2G Documents [B2G Mandatory Fields](https://developers.s1ecos.com/b2g-mandatory-fields-929776m0.md): 
- eInvoicing Service > eInvoicing Service API > API Endpoints > B2G Documents [B2G Status response](https://developers.s1ecos.com/b2g-status-response-929773m0.md): 
- eInvoicing Service > eInvoicing Service API > API Endpoints > B2G Documents [B2G Soft Reject](https://developers.s1ecos.com/b2g-soft-reject-880823m0.md): 
- eInvoicing Service > eInvoicing Service API > API Endpoints > B2G Documents [RESEED INVOICE](https://developers.s1ecos.com/reseed-invoice-929604m0.md): 
- eInvoicing Service > eInvoicing Service API > API Endpoints > B2G Documents [ΕΓΚΥΚΛΙΟΣ ΠΡΟΣ ΠΑΡΟΧΟΥΣ-ΠΡΟΜΗΘΕΥΤΕΣ ΥΠΗΡΕΣΙΩΝ ΥΓΕΙΑΣ ΓΙΑ ΤΗΝ ΗΛΕΚΤΡΟΝΙΚΗ ΤΙΜΟΛΟΓΗΣΗ](https://developers.s1ecos.com/%CE%B5%CE%B3%CE%BA%CF%85%CE%BA%CE%BB%CE%B9%CE%BF%CF%82-%CF%80%CF%81%CE%BF%CF%82-%CF%80%CE%B1%CF%81%CE%BF%CF%87%CE%BF%CF%85%CF%82-%CF%80%CF%81%CE%BF%CE%BC%CE%B7%CE%B8%CE%B5%CF%85%CF%84%CE%B5%CF%82-%CF%85%CF%80%CE%B7%CF%81%CE%B5%CF%83%CE%B9%CF%89%CE%BD-%CF%85%CE%B3%CE%B5%CE%B9%CE%B1%CF%82-%CE%B3%CE%B9%CE%B1-%CF%84%CE%B7%CE%BD-%CE%B7%CE%BB%CE%B5%CE%BA%CF%84%CF%81%CE%BF%CE%BD%CE%B9%CE%BA%CE%B7-%CF%84%CE%B9%CE%BC%CE%BF%CE%BB%CE%BF%CE%B3%CE%B7%CF%83%CE%B7-951092m0.md): 
- eInvoicing Service > eInvoicing Service API > JSON Structures & Payloads > EliseCoreDocument Structure [EliseCoreDocument Structure](https://developers.s1ecos.com/elisecoredocument-structure-869821m0.md): 
- eInvoicing Service > eInvoicing Service API > JSON Structures & Payloads > Minimum & Conditional Fields [Minimum & Conditional Fields](https://developers.s1ecos.com/minimum-conditional-fields-869822m0.md): 
- eInvoicing Service > eInvoicing Service API > JSON Structures & Payloads > Response Examples & Error Handling [Response Examples & Error Handling](https://developers.s1ecos.com/response-examples-error-handling-869823m0.md): 
- eInvoicing Service > eInvoicing Service API [Offline QR Code](https://developers.s1ecos.com/offline-qr-code-3188038f0.md): 
- eInvoicing Service > eInvoicing Service API > Offline QR Code [Offline QR Code Instructions](https://developers.s1ecos.com/offline-qr-code-instructions-871267m0.md): 
- eInvoicing Service > eInvoicing Service API > Extra Functionalities [Archiver](https://developers.s1ecos.com/archiver-3188041f0.md): 
- eInvoicing Service > eInvoicing Service API > Extra Functionalities > Archiver [Archiver Functionality](https://developers.s1ecos.com/archiver-functionality-871268m0.md): 
- eInvoicing Service > eInvoicing Service API > Terminology [Document Type Codes](https://developers.s1ecos.com/document-type-codes-869825m0.md): 
- eInvoicing Service > eInvoicing Service API > Terminology [VAT & TAX Codes](https://developers.s1ecos.com/vat-tax-codes-869826m0.md): 
- eInvoicing Service > eInvoicing Service API > Terminology [Country & Currency Codes](https://developers.s1ecos.com/country-currency-codes-869828m0.md): 
- eInvoicing Service > eInvoicing Service API > Terminology [Measurement Unit Codes (IAPR & EN16931)](https://developers.s1ecos.com/measurement-unit-codes-iapr-en16931-869829m0.md): 
- eInvoicing Service > eInvoicing Service API > Terminology [Self-Billing Remarks (IAPR)](https://developers.s1ecos.com/self-billing-remarks-iapr-869830m0.md): 
- eInvoicing Service > eInvoicing Service API > Terminology [Classification & Payment Method Codes (IAPR)](https://developers.s1ecos.com/classification-payment-method-codes-iapr-869832m0.md): 
- eInvoicing Service > eInvoicing Service API > VAT Validation  [Greek VAT Check](https://developers.s1ecos.com/greek-vat-check-869833m0.md): 
- eInvoicing Service > eInvoicing Service API > VAT Validation  [EU VAT Check](https://developers.s1ecos.com/eu-vat-check-869834m0.md): 
- eInvoicing Service > eInvoicing Service API > Attachments [Attaching Media & PDFs](https://developers.s1ecos.com/attaching-media-pdfs-869835m0.md): 
- eInvoicing Service > eInvoicing Service API > Attachments [Invoice Document Upload (Invoice/File)](https://developers.s1ecos.com/invoice-document-upload-invoicefile-869837m0.md): 
- eInvoicing Service > eInvoicing Service API > SOFTONE ERP Related Segments > SOFTONE Configurator [SOFTONE Configurator - B2G Mapping](https://developers.s1ecos.com/softone-configurator-b2g-mapping-869839m0.md): 
- eInvoicing Service > eInvoicing Service API > SOFTONE ERP Related Segments > Business & Compliance [Invoices & Taxation Rules](https://developers.s1ecos.com/invoices-taxation-rules-869842m0.md): 
- eInvoicing Service > eInvoicing Service API > SOFTONE ERP Related Segments > Business & Compliance [B2G Invoicing & Legal Requirements](https://developers.s1ecos.com/b2g-invoicing-legal-requirements-869844m0.md): 
- eInvoicing Service > eInvoicing Service API > SOFTONE ERP Related Segments > Business & Compliance [Integration with ERP Systems](https://developers.s1ecos.com/integration-with-erp-systems-869845m0.md): 
- eInvoicing Service > eInvoicing Portal [Authentication](https://developers.s1ecos.com/authentication-869848m0.md): 
- eInvoicing Service > eInvoicing Portal [Single Sign-On (SSO)](https://developers.s1ecos.com/single-sign-on-sso-869849m0.md): 
- eInvoicing Service > eInvoicing Portal [Template Configuration (Default Template)](https://developers.s1ecos.com/template-configuration-default-template-869850m0.md): 
- eInvoicing Service > eInvoicing Portal [Portal Manual (for second phase of APIDOG Update)](https://developers.s1ecos.com/portal-manual-for-second-phase-of-apidog-update-869851m0.md): 
- eInvoicing Service > WIKI JSON Internal [B2G Invoices](https://developers.s1ecos.com/b2g-invoices-821858m0.md): 
- eInvoicing Service > WIKI JSON Internal [1.1 B2B](https://developers.s1ecos.com/1-1-b2b-821843m0.md): 
- eInvoicing Service > WIKI JSON Internal [1.2 B2B](https://developers.s1ecos.com/1-2-b2b-821845m0.md): 
- eInvoicing Service > WIKI JSON Internal [1.3 B2B](https://developers.s1ecos.com/1-3-b2b-821847m0.md): 
- eInvoicing Service > WIKI JSON Internal [1.4 B2B](https://developers.s1ecos.com/1-4-b2b-821850m0.md): 
- eInvoicing Service > WIKI JSON Internal [1.5 B2B](https://developers.s1ecos.com/1-5-b2b-821851m0.md): 
- eInvoicing Service > WIKI JSON Internal [1.6 B2B](https://developers.s1ecos.com/1-6-b2b-821853m0.md): 
- eInvoicing Service > WIKI JSON Internal [2.1 B2B](https://developers.s1ecos.com/2-1-b2b-821854m0.md): 
- eInvoicing Service > WIKI JSON Internal [2.2 B2B](https://developers.s1ecos.com/2-2-b2b-821855m0.md): 
- eInvoicing Service > WIKI JSON Internal [2.3 B2B](https://developers.s1ecos.com/2-3-b2b-821856m0.md): 
- eInvoicing Service > WIKI JSON Internal [2.4 B2B](https://developers.s1ecos.com/2-4-b2b-821861m0.md): 
- eInvoicing Service > WIKI JSON Internal [3.1 B2B](https://developers.s1ecos.com/3-1-b2b-821862m0.md): 
- eInvoicing Service > WIKI JSON Internal [3.2 B2B](https://developers.s1ecos.com/3-2-b2b-821864m0.md): 
- eInvoicing Service > WIKI JSON Internal [5.1 B2B](https://developers.s1ecos.com/5-1-b2b-821865m0.md): 
- eInvoicing Service > WIKI JSON Internal [5.2 B2B](https://developers.s1ecos.com/5-2-b2b-821868m0.md): 
- eInvoicing Service > WIKI JSON Internal [6.1 B2B](https://developers.s1ecos.com/6-1-b2b-821869m0.md): 
- eInvoicing Service > WIKI JSON Internal [6.2 B2B](https://developers.s1ecos.com/6-2-b2b-821871m0.md): 
- eInvoicing Service > WIKI JSON Internal [7.1 B2B](https://developers.s1ecos.com/7-1-b2b-835311m0.md): 
- eInvoicing Service > WIKI JSON Internal [8.1 B2B](https://developers.s1ecos.com/8-1-b2b-821873m0.md): 
- eInvoicing Service > WIKI JSON Internal [8.2 B2B](https://developers.s1ecos.com/8-2-b2b-821874m0.md): 
- eInvoicing Service > WIKI JSON Internal [11.1 B2C](https://developers.s1ecos.com/11-1-b2c-821875m0.md): 
- eInvoicing Service > WIKI JSON Internal [11.2 B2C](https://developers.s1ecos.com/11-2-b2c-821876m0.md): 
- eInvoicing Service > WIKI JSON Internal [11.3 B2C](https://developers.s1ecos.com/11-3-b2c-821878m0.md): 
- eInvoicing Service > WIKI JSON Internal [11.4 B2C](https://developers.s1ecos.com/11-4-b2c-821880m0.md): 
- eInvoicing Service > WIKI JSON Internal [11.5 B2C](https://developers.s1ecos.com/11-5-b2c-821881m0.md): 
- eInvoicing Service > WIKI JSON Internal [Gift cards](https://developers.s1ecos.com/gift-cards-835340m0.md): 

## API Docs
- eInvoicing Service > eInvoicing Service API > API Authentication > API Key Authentication [/Authentication/login ](https://developers.s1ecos.com/authenticationlogin-14666626e0.md): ## 1.3.1	Authentication
- eInvoicing Service > eInvoicing Service API > API Authentication > API Key Authentication [MyData Status](https://developers.s1ecos.com/mydata-status-14696624e0.md): 
- eInvoicing Service > eInvoicing Service API > API Authentication > Bearer Token Authentication [/Authentication/login ](https://developers.s1ecos.com/authenticationlogin-14666619e0.md): ### 1.3.1.2	BEARER TOKEN
- eInvoicing Service > eInvoicing Service API > API Endpoints > Sending a Document [einvoice/json](https://developers.s1ecos.com/einvoicejson-14696783e0.md): Sending a document
- eInvoicing Service > eInvoicing Service API > API Endpoints > Sending a Document [einvoice/json Copy](https://developers.s1ecos.com/einvoicejson-copy-14700446e0.md): ##	Sending a document
- eInvoicing Service > eInvoicing Service API > API Endpoints > Sending a Document [/invoice/credit](https://developers.s1ecos.com/invoicecredit-14702653e0.md): 
- eInvoicing Service > eInvoicing Service API > API Endpoints > Sending a Document [SignPOS](https://developers.s1ecos.com/signpos-14738847e0.md): 
- eInvoicing Service > eInvoicing Service API > My data status [MyData/status](https://developers.s1ecos.com/mydatastatus-15756310e0.md): 
- eInvoicing Service > WIKI JSON Samples [1.1 B2B Test](https://developers.s1ecos.com/1-1-b2b-test-14700659e0.md): 
- eInvoicing Service > WIKI JSON Samples [1.3 B2B Sales Invoice Third Country Supplies](https://developers.s1ecos.com/1-3-b2b-sales-invoice-third-country-supplies-14701080e0.md): 
- eInvoicing Service > WIKI JSON Samples [5.2 B2B Credit Invoice Non-Associated](https://developers.s1ecos.com/5-2-b2b-credit-invoice-non-associated-14701179e0.md): 
- eInvoicing Service > WIKI JSON Samples [2.1 B2B Service Rendered Invoice](https://developers.s1ecos.com/2-1-b2b-service-rendered-invoice-14701261e0.md): 
- eInvoicing Service > WIKI JSON Samples [1.1 debit b2g sample](https://developers.s1ecos.com/1-1-debit-b2g-sample-14701375e0.md): 
- eInvoicing Service > WIKI JSON Samples [11.1 B2C Retail Sales Receipt](https://developers.s1ecos.com/11-1-b2c-retail-sales-receipt-14701416e0.md): 
- eInvoicing Service > WIKI JSON Samples [11.4 Retail Sales Credit Note](https://developers.s1ecos.com/11-4-retail-sales-credit-note-14701458e0.md):