Create or update an invoice customer

curl --request POST \ --url https://api.app.lastaccountingcompany.com/portal/invoice-customers \ --header 'Authorization: Bearer <token>' \ --header 'Content-Type: application/json' \ --data ' { "name": "<string>", "id": "<string>", "business_id": "<string>", "vat_number": "<string>", "address_line1": "<string>", "postal_code": "<string>", "city": "<string>", "country_code": "<string>", "email": "<string>", "einvoice_address": "<string>", "einvoice_operator": "<string>", "default_payment_terms_days": 123, "default_vat_code": "<string>", "default_vat_rate_basis_points": 123, "default_invoice_language": "<string>" } '

{ "name": "<string>", "id": "<string>", "business_id": "<string>", "vat_number": "<string>", "address_line1": "<string>", "postal_code": "<string>", "city": "<string>", "country_code": "<string>", "email": "<string>", "einvoice_address": "<string>", "einvoice_operator": "<string>", "default_payment_terms_days": 123, "default_vat_code": "<string>", "default_vat_rate_basis_points": 123, "default_invoice_language": "<string>" }

Authorizations

Authorization

string

header

required

Portal API key minted in portal Settings → API access. Scope read or write; pinned to one company. Send as Authorization: Bearer lac_sk_....

Body

application/json

An invoicing counterparty (the customer you invoice), with e-invoice routing and per-party defaults. Rates in basis points (25.5% = 2550).

name

string

required

string

Party id. Include on upsert to update an existing party.

business_id

string

Finnish business ID (Y-tunnus), e.g. 1234567-8.

vat_number

string

EU VAT number, e.g. FI12345678.

address_line1

string

postal_code

string

city

string

country_code

string

ISO 3166-1 alpha-2, e.g. FI.

string

einvoice_address

string

E-invoice (verkkolasku) address, e.g. an OVT identifier.

einvoice_operator

string

E-invoice operator/intermediator code.

default_payment_terms_days

integer

default_vat_code

string

default_vat_rate_basis_points

integer

Default VAT rate in basis points (25.5% = 2550).

default_invoice_language

string

Response

Upserted party.

An invoicing counterparty (the customer you invoice), with e-invoice routing and per-party defaults. Rates in basis points (25.5% = 2550).

name

string

required

string

Party id. Include on upsert to update an existing party.

business_id

string

Finnish business ID (Y-tunnus), e.g. 1234567-8.

vat_number

string

EU VAT number, e.g. FI12345678.

address_line1

string

postal_code

string

city

string

country_code

string

ISO 3166-1 alpha-2, e.g. FI.

string

einvoice_address

string

E-invoice (verkkolasku) address, e.g. an OVT identifier.

einvoice_operator

string

E-invoice operator/intermediator code.

default_payment_terms_days

integer

default_vat_code

string

default_vat_rate_basis_points

integer

Default VAT rate in basis points (25.5% = 2550).

default_invoice_language

string