Responsibility Matrix: Operator, Seller, and Suppliers

Area	Marketplace Operator	Seller	External Supplier
Seller Identity	Collects or obtains only data required for its own obligations from the PSP source, verifies remaining elements, and archives proof	Provides true, up-to-date data and documents	PSP performs KYC and may be a data source; the operator does not duplicate it unnecessarily but remains responsible for missing DSA/DAC7 elements
Sales Agreement	Indicates the party to the agreement, forwards the order and proof	Is a party, carries out delivery, withdrawal, and complaint handling	Courier carries out transport according to its role
Product Compliance	Designs mandatory fields, checks, reacts, blocks, and cooperates	Provides information and proof; is responsible according to the role of manufacturer/importer/distributor	Laboratory or representative may provide proof; does not automatically assume responsibility
Price and Promotion	Ensures correct interface, price history, consistency, and markings	Sets the correct price and declares promotions according to the rules	Pricing tool operates within the limits set by the operator
Personal Data	Controller of its own processes; limits access, fulfills rights, and ensures security	Separate controller for data needed for its sales	Processor or separate controller according to the actual role
Payment	Integrates PSP, reconciles refunds and information flow	Undergoes PSP onboarding, receives payouts, and bears agreed costs	Licensed PSP handles accounts, settlement, payment KYC, and part of fraud
EPR and packaging	Checks seller's declaration and EPR registration; responsible for its own goods, imports, or fulfillment	Defines its role and accounts for packaging/products it is responsible for	Fulfillment must report packaging consumption to the relevant responsible entity
DAC7	Determines operator status, collects, verifies, reports, and informs	Provides data and updates it	PSP may be a source of some data based on the agreement and agreed integration
Moderation and Reports	Manages the reporting channel, decisions, justifications, and appeal path	Reacts, corrects the offer, provides proof	Moderation tool supports, but responsibility for the decision remains with the operator

Need to implement these processes in a real marketplace?

I design multi-vendor platforms with onboarding, payments, moderation, and operational workflows.

Explore marketplace development