RESOURCES
Guides, articles and answers for your business
How-to guides for Wrapp, practical myDATA and invoicing guides, and regulatory news. All in one place.
Popular Articles
Mandatory e-invoicing in Greece moved to 2 November 2026: deadlines, penalties and what to do now
ReadGreece's 2026 Farm Subsidy Application on myAGRO: Which Expense Documents Count
ReadNBG Pay POS integration with EDPS
ReadDidn't File a Greek Tax Return? How AADE's Estimated Assessment Works and What It Costs
ReadHow to Upgrade Your Wrapp Subscription and Change Plan
ReadBlog
Articles and guides on myDATA, invoicing, tax and running your business
Mandatory e-invoicing in Greece moved to 2 November 2026: deadlines, penalties and what to do now
ReadGreece's 2026 Farm Subsidy Application on myAGRO: Which Expense Documents Count
ReadDidn't File a Greek Tax Return? How AADE's Estimated Assessment Works and What It Costs
ReadImputed (Deemed) Income in Greece: How to Dispute It and Cut Your Tax (2026)
ReadWho files the myDATA provider declaration, and why the old page looks empty
ReadConnect WooCommerce to myDATA, step by step
ReadSkroutz order invoicing to myDATA, on autopilot
ReadGreek Tax Returns 2026: E3 Form, New Activity Codes (KAD) and myDATA
ReadRestaurant ordering systems and myDATA: issuing through a ΥΠΑΗΕΣ provider, from the order note to the card
ReadHow SaaS & ERP Platforms Become myDATA-Compliant via API
ReadHow to Level Up Your Ecommerce in 2026
Read10 Reasons Your Business Might Not Make It and How to Build Resilience
ReadE-invoicing: Why Every Small Business Wins by Starting Today
ReadA Short Guide to the All-in-One Devices Replacing Legacy Cash Registers
ReadDigitisation
What actually changes when you digitise your business, sector by sector, from daily operations through to the receipt
Real estate agency: how to connect Real Status with Wrapp
ReadRestaurant digitisation in Greece: from the handheld order to the receipt
ReadRetail and e-commerce digitisation: from the order to the invoice
ReadOrdio and Wrapp: order taking, card payments and myDATA receipts in one system for your restaurant
ReadIssuing Documents
Everything about issuing invoices and receipts
VAT Exemption Articles in Greece: the Updated List (Law 5144/2024)
ReadHow to Issue an Invoice or Receipt in Wrapp
ReadHow to Issue a Linked Credit Invoice
ReadHow to Charge the Climate Crisis Resilience Fee
ReadHow to Create a Payment Receipt
ReadHow to Change an Invoice's Payment Status
ReadHow to Use Filters to Find Specific Documents
ReadHow to Issue a Simplified Invoice
ReadHow to Issue a Delivery Note
ReadInvoicing a Customer Outside the EU from Greece
ReadIntra-Community Invoicing from Greece, With and Without VAT
ReadAccount Setup
Everything about configuring your account
How to Add Your Bank Account Details
ReadHow to Bulk-Import Your Products and Services
ReadHow to Add Your Company Logo
ReadHow to Enable Customer Lookup by VAT Number (TaxisNet)
ReadAADE Special Codes: Enabling VAT Number Lookup Through Taxis
ReadE-invoicing Provider Authorisation Failing on TaxisNet? Check Your AADE Contact Details
ReadHow to Create Your Wrapp Account
ReadHow to Create a New Billing Book (Document Series)
ReadHow to Cancel Your Subscription and Stop Automatic Renewals
ReadHow to Renew Your Subscription After It Expires
ReadHow to Upgrade Your Wrapp Subscription and Change Plan
ReadPublic Sector Invoices (B2G)
Issuing invoices to Greek public sector entities (B2G)
Digital Clientele
How to use the Digital Clientele registry
POS
POS interconnection
NBG Pay POS integration with EDPS
ReadConnecting Wrapp Terminal to NBG Pay Tap on Mobile (Mellon)
ReadHow to Connect a Viva softPOS to Wrapp
ReadWorldline Smart POS integration with Wrapp: myDATA guide
ReadHow to Connect Your All-in-One POS Device to Wrapp
Readepay POS and SoftPOS integration with Wrapp: myDATA guide
ReadConnect myPOS to Wrapp: myDATA guide
ReadAPI & Developers
If your documents originate in your own system, eshop, ERP or platform, integration happens over a REST API. The documentation and the steps to partner with us are here.
myDATA sandbox API key: where to find your Wrapp test key
ReadWrapp Partner Portal: how to start as a partner and invite your customers
ReadmyDATA fuel codes (fuel_code): issuing fuel station documents through the API
ReadSales on behalf of third parties: issuing myDATA 1.4 and 1.5 documents through the API
ReadOSS and EU distance sales to consumers: issuing myDATA documents through the API
ReadCatering order notes (myDATA 8.6): the 24-hour correlation rule and the API
ReadInvoicing in a foreign currency from Greece: the myDATA exchange rate via API
ReadRestaurant ordering systems and the myDATA API: every JSON example, from the order note to the card refund
ReadSplit payment in restaurants: cash and card on one bill, and the card at the table through the API
ReadRefunds to the card through the API: 8.5, 11.4 and which document charged the card
ReadTreats, discounts and tips in myDATA through the API: what to send, and the discount trap
ReadNo internet or myDATA down: retrying with external_id and closing the day without a Z report
Readaade_preloaded: the receipt before the card payment, for delivery, pick-up and the table
ReadREST API Documentation
Endpoints, fields and examples for issuing and transmitting documents through the API.
Read the documentationPartner Onboarding API
Documentation for platforms that create and manage accounts on behalf of their own customers.
Read the documentationBecome a Partner
Staging environment, technical support and commercial terms for platforms and partners.
See how to startmyDATA code tables for the API
The official myDATA code lists, as the API accepts them. Each table gives the values you send in the fields of a document.