Send an invoice for payment

Emails an open send_invoice invoice to its customer, in the invoice's language: the amount due (after the credit balance), the due date, the legal entity's bank transfer details (account holder, IBAN, BIC, bank) and the payment reference, which is the invoice number, with a link to the PDF.

Sending again sends the email again; sentAt says when it last went out. Reminders before and after the due date are sent automatically. The entity needs bank transfer details in its invoice settings (invoice_bank_transfer_missing otherwise). The email goes out after the request commits; a dry run sends nothing.

At a glance

REST: POST /api/v1/invoices/{id}/send
MCP tool: invoices_send
Operation ID: invoices.send
Scope: Brand
Permission: invoices:write
Risk tier: write
Dry run: Supported (send Ownrecord-Dry-Run: true)
Idempotency: Idempotency-Key required
Modes: Test and live
Authentication: API key with the invoices:write scope
Since: M5

Request

Path parameters

Field	Type	Description
`id`	`inv_…` ID	The invoice ID (`inv_…`).

Body

A JSON object (Content-Type: application/json):

Field	Type	Required	Description
`expectedVersion`	integer (at least 1)	No	The `version` you read; a newer stored version fails with `version_conflict`.

Response

200 OK with a JSON object:

Field	Type	Description
`id`	`inv_…` ID
`object`	`"invoice"`
`livemode`	boolean
`entityId`	`ent_…` ID
`brandId`	`brd_…` ID
`number`	string or null	The invoice number: gap-free per legal entity, mode, brand series and year (§18.2). Null for a draft: the number is taken at finalization.
`numbering`	object or null
`customerId`	`cus_…` ID or null
`subscriptionId`	`sub_…` ID or null
`collectionMethod`	one of `charge_automatically`, `send_invoice`
`kind`	one of `invoice`, `receipt` or null	`invoice` (business customers) or `receipt` (the receipt-invoice consumers get); null for a draft.
`status`	one of 9 values, e.g. `draft`, `pending_registration`, `issued` (all in the OpenAPI document)	`draft` → `open` (finalized) → `paid`, `void` or `uncollectible`. Checkout invoices are `issued` (paid at once), or `pending_registration`: a full invoice charged before the tax registration exists; the receipt went out and the formal invoice follows (§18.1).
`language`	one of `en`, `de`, `fr`, `hr`, `it`, `es` or null
`issuedAt`	date-time or null
`issueDate`	string or null	The issue date in the seller's time zone.
`taxPoint`	date-time or null
`taxPointDate`	string or null	The date of supply in the seller's time zone.
`daysUntilDue`	integer or null	send_invoice: days from the issue date to the due date.
`dueDate`	string or null	send_invoice: when payment is due (fixed at finalization).
`seller`	object or null
`buyer`	object or null
`currency`	string
`lines`	array of object
`lines[].id`	string	The tax quote's line ID.
`lines[].description`	string
`lines[].productId`	`prod_…` ID or null
`lines[].priceId`	`price_…` ID or null
`lines[].quantity`	integer
`lines[].taxCategoryId`	one of 9 values, e.g. `electronically_supplied_service`, `saas`, `ebook` (all in the OpenAPI document)
`lines[].taxBehavior`	one of `inclusive`, `exclusive`
`lines[].unitAmount`	money	The net price of one unit (may be finer than the minor unit).
`lines[].net`	money
`lines[].tax`	object
`lines[].tax.ratePpm`	string	Parts per million as a string (19% = "190000").
`lines[].tax.amount`	money
`lines[].tax.jurisdictionId`	string or null
`lines[].tax.regimeId`	string or null
`lines[].tax.decision`	one of `charge`, `reverse_charge`, `exempt`, `not_taxable`, `out_of_scope`, `not_collected`, `blocked`	What happened to the tax: `charge`, `reverse_charge`, `exempt`, `not_taxable`, `out_of_scope`, `not_collected`.
`lines[].tax.rateKind`	one of `standard`, `reduced`, `super_reduced`, `parking`, `zero`, `exempt`, `not_taxable` or null
`lines[].tax.rateId`	string or null
`lines[].tax.pendingRegistration`	boolean
`lines[].gross`	money
`lines[].kind`	one of `licensed`, `metered`, `late_usage`, `proration`, `invoice_item` or null	Where the line came from (§16.3 order); null on checkout invoices.
`lines[].period`	object or null
`lines[].subscriptionItemId`	string or null
`lines[].invoiceItemId`	`ii_…` ID or null
`lines[].discount`	money or null	What discounts took off the line before tax.
`lines[].meteredQuantity`	string or null	A metered line's usage (its quantity is 1).
`totals`	object or null
`taxCurrencyTotals`	object or null	The tax in the seller's tax currency when the invoice is in another one (§18.3).
`creditApplied`	money or null	Taken from the customer's credit balance at finalization (§16.11).
`amountDue`	money or null	What the customer pays: the gross total less the credit applied. Null on checkout invoices.
`notes`	array of object
`notes[].code`	one of `reverse_charge`, `exempt`, `out_of_scope`, `registration_pending`, `oss_scheme`
`notes[].text`	string	The note as printed.
`fieldCheck`	object or null	What the knowledge base's invoicing rules ask for that the invoice lacks (`missing`), and requirements Ownrecord can't check yet (`unchecked`).
`pendingRegistration`	boolean	A full invoice with a line charged before the registration exists (§18.1).
`paymentIds`	array of `pay_…` ID
`creditNoteIds`	array of `cn_…` ID
`ledgerTxnIds`	array of `txn_…` ID
`quoteId`	`tq_…` ID or null	The tax quote the invoice shows (null for a draft).
`quoteIds`	array of `tq_…` ID	Every quote of the invoice: lines taxed at another date (prorations) have their own quote.
`pdf`	object or null	Null for a draft: the PDF is rendered at finalization.
`finalizedAt`	date-time or null
`paidAt`	date-time or null
`payment`	object or null	How the invoice was paid: `bank_transfer` (marked paid), `processor` (a card or debit payment) or `credit_balance`.
`voidedAt`	date-time or null
`markedUncollectibleAt`	date-time or null
`emailedAt`	date-time or null
`sentAt`	date-time or null	When `invoices.send` last emailed the invoice.
`draft`	object or null	A draft's lines before tax (tax is quoted at finalization); null once finalized.
`metadata`	object
`version`	integer	Pass it as `expectedVersion` to refuse a change if the invoice changed. Rendering the PDF and emailing the invoice change it too.
`createdAt`	date-time
`updatedAt`	date-time

Examples

Send the finalized consulting invoice

HTTP

POST /api/v1/invoices/inv_01m4tx5nj8emwbyf7y9vcf47yk/send
Authorization: Bearer or_test_…
Idempotency-Key: 3f1c9a52-7d0e-4b8f-9a61-0c2d5e8b7f14

Response (200):

JSON

{
  "id": "inv_01m4tx5nj8emwbyf7y9vcf47yk",
  "object": "invoice",
  "livemode": false,
  "entityId": "ent_01m4tx5nj8emwbyf7y9vcf47x2",
  "brandId": "brd_01m4tx5nj8emwbyf7y9vcf47x4",
  "number": "GEN-2026-000131",
  "numbering": {
    "series": "GEN",
    "year": 2026,
    "seq": "131"
  },
  "customerId": "cus_01m4tx5nj8emwbyf7y9vcf47ym",
  "subscriptionId": null,
  "collectionMethod": "send_invoice",
  "kind": "invoice",
  "status": "open",
  "language": "en",
  "issuedAt": "2026-10-20T09:00:00.000Z",
  "issueDate": "2026-10-20",
  "taxPoint": "2026-10-20T09:00:00.000Z",
  "taxPointDate": "2026-10-20",
  "daysUntilDue": 14,
  "dueDate": "2026-11-03",
  "seller": {
    "entityId": "ent_01m4tx5nj8emwbyf7y9vcf47x2",
    "legalName": "Acme Digital d.o.o.",
    "tradingName": null,
    "address": {
      "line1": "Ilica 1",
      "line2": null,
      "city": "Zagreb",
      "postalCode": "10000",
      "region": null,
      "country": "HR"
    },
    "companyRegistryId": "080000001",
    "taxIds": [
      {
        "type": "eu_vat",
        "value": "HR12345678901",
        "regimeId": null
      }
    ],
    "brand": {
      "brandId": "brd_01m4tx5nj8emwbyf7y9vcf47x4",
      "name": "Genno",
      "primaryColor": "#0E6B5C",
      "accentColor": null,
      "supportEmail": "help@genno.example",
      "supportUrl": null
    },
    "footerText": null
  },
  "buyer": {
    "type": "b2b",
    "customerId": "cus_01m4tx5nj8emwbyf7y9vcf47ym",
    "name": "Alpen Apps GmbH",
    "email": "billing@alpen.example",
    "address": null,
    "country": "AT",
    "taxId": {
      "type": "eu_vat",
      "value": "ATU00000000",
      "country": "AT"
    }
  },
  "currency": "EUR",
  "lines": [
    {
      "id": "1",
      "description": "Implementation workshop (days)",
      "productId": "prod_01m4tx5nj8emwbyf7y9vcf47yr",
      "priceId": null,
      "quantity": 2,
      "taxCategoryId": "consulting_remote",
      "taxBehavior": "exclusive",
      "unitAmount": {
        "amount": "600000000",
        "currency": "EUR"
      },
      "net": {
        "amount": "1200000000",
        "currency": "EUR"
      },
      "tax": {
        "ratePpm": "0",
        "amount": {
          "amount": "0",
          "currency": "EUR"
        },
        "jurisdictionId": "AT",
        "regimeId": "EU_OSS_UNION",
        "decision": "reverse_charge",
        "rateKind": null,
        "rateId": null,
        "pendingRegistration": false
      },
      "gross": {
        "amount": "1200000000",
        "currency": "EUR"
      },
      "kind": "invoice_item",
      "period": null,
      "subscriptionItemId": null,
      "invoiceItemId": "ii_01m4tx5nj8emwbyf7y9vcf47ys",
      "discount": null,
      "meteredQuantity": null
    }
  ],
  "totals": {
    "net": {
      "amount": "1200000000",
      "currency": "EUR"
    },
    "tax": {
      "amount": "0",
      "currency": "EUR"
    },
    "gross": {
      "amount": "1200000000",
      "currency": "EUR"
    },
    "taxByRate": [
      {
        "ratePpm": "0",
        "jurisdictionId": "AT",
        "regimeId": "EU_OSS_UNION",
        "decision": "reverse_charge",
        "net": {
          "amount": "1200000000",
          "currency": "EUR"
        },
        "tax": {
          "amount": "0",
          "currency": "EUR"
        }
      }
    ]
  },
  "taxCurrencyTotals": null,
  "creditApplied": {
    "amount": "200000000",
    "currency": "EUR"
  },
  "amountDue": {
    "amount": "1000000000",
    "currency": "EUR"
  },
  "notes": [
    {
      "code": "reverse_charge",
      "text": "Prijenos porezne obveze (reverse charge) – čl. 17. st. 1. Zakona o PDV-u"
    }
  ],
  "fieldCheck": {
    "invoicingRuleIds": [],
    "missing": ["buyer_address"],
    "unchecked": []
  },
  "pendingRegistration": false,
  "paymentIds": [],
  "creditNoteIds": [],
  "ledgerTxnIds": ["txn_01m4tx5nj8emwbyf7y9vcf47yn"],
  "quoteId": "tq_01m4tx5nj8emwbyf7y9vcf47xr",
  "quoteIds": ["tq_01m4tx5nj8emwbyf7y9vcf47xr"],
  "pdf": {
    "status": "pending",
    "fileId": null,
    "sha256": null,
    "size": null,
    "templateVersion": null,
    "renderedAt": null,
    "url": "/api/v1/invoices/inv_01m4tx5nj8emwbyf7y9vcf47yk/pdf"
  },
  "finalizedAt": "2026-10-20T09:00:00.000Z",
  "paidAt": null,
  "payment": null,
  "voidedAt": null,
  "markedUncollectibleAt": null,
  "emailedAt": "2026-10-20T09:01:00.000Z",
  "sentAt": "2026-10-20T09:01:00.000Z",
  "draft": null,
  "metadata": {
    "contract": "ENT-2026-07"
  },
  "version": 3,
  "createdAt": "2026-10-20T08:30:00.000Z",
  "updatedAt": "2026-10-20T09:01:00.000Z"
}

Errors

Code	HTTP status	When	What to do
`validation_failed`	400	`id` is malformed, or the customer has no email address.	Fix the fields listed in `details.issues` and send the request again.
`resource_not_found`	404	This brand has no such invoice in this mode (invoices belong to one brand and one mode).	Check the ID and that your credentials are scoped to the right organization, entity, brand and mode.
`invoice_status_invalid`	409	Only open `send_invoice` invoices are sent (drafts are finalized first).	Check the invoice's `status` (`details.status`) and what it still allows (`details.allowed_actions`). Drafts are edited and finalized; open invoices are sent, paid, voided or marked uncollectible; paid and void invoices don't change (corrections are credit notes).
`invoice_bank_transfer_missing`	409	The legal entity has no bank transfer details for the customer to pay to.	Add the IBAN, BIC, bank name and account holder in the entity's invoice settings, then send the invoice again. A send_invoice invoice tells the customer where to pay.
`version_conflict`	409	The invoice changed since `expectedVersion`, or at the same moment; read it again and retry.	Fetch the object again and retry the change.
`idempotency_key_reused`	409	The idempotency key was used before for another request.	Use a new Idempotency-Key for a different request, or resend the original request unchanged.
`scope_required`	400	The request names no brand (an org or entity key without `Ownrecord-Brand`).	Call the operation with credentials or a target at its level: an organization, a legal entity, a brand or the platform (`details.required_scope`).
`permission_denied`	403	You can't change this brand's invoices (`invoices:write`: finance, owners and admins).	Ask an organization owner or admin for a role or scope that allows this action.
`livemode_not_allowed`	403	You have no live-mode access, so you can't use live invoices.	Use test mode, or credentials for the target's mode. Developers need live access granted by an organization owner or admin.

It can also return these common errors: api_version_unsupported, invalid_json, unsupported_media_type, authentication_required, api_key_invalid, idempotency_key_required, idempotency_in_progress, approval_required, approval_rejected, approval_expired, stale_approval, approval_policy_denied, rate_limited, internal_error.

At a glance#

Request#

Path parameters#

Body#

Response#

Examples#

Send the finalized consulting invoice#

Errors#