Separate bill-to from ship-to
Confirm whether every invoice goes to one fixed marketplace entity while the end customer remains only the delivery recipient.
MARKETPLACE ORDERS / E-INVOICE RULES / WRITTEN FIRST
Turn marketplace orders into invoices without losing the rules.
A written feasibility gate for marketplace sellers who need order data mapped to e-invoices, returns, fixed billing entities, and duplicate-safe processing.
Start with a redacted order response, field list, or rule sheet. No credentials, customer data, or production access first.
No call required. The first answer is written, with a field map, risk list, and smallest next-step quote.
For: marketplace orders that must become accurate invoices, not just copied records.
You will receive: a field and state map, billing decision points, duplicate and return risks, and the smallest sensible build scope.
Prepare: one sanitized order response or field list, invoice rules, return trigger, and target API documentation. Do not send credentials or customer data first.
Next: check the fit and limits, then use “Check this workflow in writing” above.
THE TWO DECISIONS THAT CHANGE THE BUILDGet the invoice customer
Get the invoice customer
and billing moment right.
Most risk sits in the business rules around an order. The feasibility gate makes those rules explicit before any live connection is built.
Choose the safe order state
Decide whether invoicing starts at acceptance, complete shipment, or another explicit state. Partial shipments and returns cannot be left implicit.
WHAT THE GATE CHECKS
One order in. One accountable invoice out.
The review follows the record from source order to invoice, then checks what happens when the same order is seen again or later returned.
Accepted or shipped?
Map the source state allowed to create an invoice and identify the periodic-run or delivery expectation.
Fixed entity, correct address
Keep invoice customer, VAT treatment, delivery address, and payment terms in their proper fields.
One invoice per order
Use a stable order identifier and stored status so retries do not create a second invoice.
Credit note after confirmation
Define the confirmed-return event and the information needed before a credit note can be issued.
WHAT YOU RECEIVE
A written answer you can use to decide.
The review answers “can this be automated safely, and what is the smallest build?” before anyone asks for production credentials.
Included in EUR 350
- Field map from marketplace order to invoice request
- Order-state and return-state decision map
- Duplicate, retry, and failure risks
- Open questions and smallest implementation scope
- Written recommendation within two business days
Not included in the gate
- Production credentials, live writes, or activation
- Partial-shipment invoicing in the first build
- 24/7 monitoring or on-call operations
- Accounting, tax, or legal advice
- Marketplace, provider, or hosting fees
IF THE GATE PASSESMove from a rule map
Move from a rule map
to a controlled first build.
EUR 1,900–2,400
Typical first-build target after API verification: order intake, invoice creation, duplicate guard, return handling, and a simple status log.
7–10 business days
Final scope, test cases, payment route, and handoff point are agreed in writing after the representative order and API behavior are checked.
The range is not a quote before verification. Submitting an inquiry does not create a contract or charge. Scope, exclusions, payment route, start date, delivery, and completion criteria are agreed in writing first. Sales terms and privacy terms.
REVIEW THE WORKING STYLESee how states,
See how states,
retries, and stop conditions are written down.
These public examples use fictional data. They are not marketplace, Billit, or client deployments. They show the explicitness used for duplicate checks, failures, and approval points.
PUBLIC / FICTIONAL DATA / REVIEWABLENOT CLIENT WORK
- customer
- fixed bill-to / delivery ship-to CHECKED
- order
- one invoice per stable ID CHECKED
- return
- credit note after confirmation CHECKED
NO-CALL PROCESS
Four written steps from question to build.
You keep control of accounts, customer data, and production activation at every stage.
Share a sanitized shape
Order fields, invoice rules, target API, and the question that needs an answer.
Receive the feasibility gate
Field mapping, state rules, risks, open questions, and a written recommendation.
Choose the next scope
Proceed, change the design, or stop. No build starts from an ambiguous brief.
Test before activation
Use agreed cases, keep the workflow inactive until approved, then hand off the result.
START WITH THE EUR 350 GATE
Check this workflow in writingKnow the rules before you pay for the build.
Send the smallest sanitized brief. The first response stays in writing and does not require a call, credentials, or production access.