> ## Documentation Index > Fetch the complete documentation index at: https://docs.pasca.name.ng/llms.txt > Use this file to discover all available pages before exploring further. # Sign Invoice > POST /api/v1/einvoice/sign **POST** `/api/v1/einvoice/sign` ## Request example ```bash theme={null} curl -X POST "{{BASE_URL}}/api/v1/einvoice/sign" \ -H "API-KEY: " \ -H "API-SECRET: " \ -H "Accept: application/json" ``` Request body: ```json theme={null} { "business_id": "{{BUSINESS_ID}}", "irn": "{{IRN}}", "issue_date": "2024-05-14", "invoice_type_code": "396", "document_currency_code": "NGN", "tax_currency_code": "NGN", "invoice_kind": "B2B", "invoice_delivery_period": { "start_date": "2024-06-14", "end_date": "2024-06-16" }, "order_reference": "order REF IRN?", "billing_reference": [ { "irn": "ITW001-E9E0C0D3-20240619", "issue_date": "2024-05-14" }, { "irn": "ITW001-E9E0C0D3-20240619", "issue_date": "2024-05-14" } ], "dispatch_document_reference": { "irn": "ITW001-E9E0C0D3-20240619", "issue_date": "2024-05-14" }, "receipt_document_reference": { "irn": "ITW001-E9E0C0D3-20240619", "issue_date": "2024-05-14" }, "originator_document_reference": { "irn": "ITW001-E9E0C0D3-20240619", "issue_date": "2024-05-14" }, "contract_document_reference": { "irn": "ITW001-E9E0C0D3-20240619", "issue_date": "2024-05-14" }, "accounting_customer_party": { "party_name": "Test Accounting Customer Party", "tin": "83526544-2627", "email": "test_sender@pasca.co", "telephone": "+23480254099000", "business_description": "Sample business description", "postal_address": { "street_name": "32, owonikoko street", "city_name": "Gwarikpa", "postal_zone": "023401", "lga": "NG-AB-ANO", "state": "NG-AB", "country": "NG" } }, "accounting_supplier_party": { "party_name": "Dangote Group", "tin": "33824622-7135", "email": "tobi@pasca.co", "telephone": "+2348168527167", "business_description": "This is the test supplier details", "postal_address": { "street_name": "32, owonikoko street", "city_name": "Gwarikpa", "postal_zone": "023401", "lga": "NG-AB-ANO", "state": "NG-AB", "country": "NG" } }, "actual_delivery_date": "2024-05-14", "payment_means": [ { "payment_means_code": "10", "payment_due_date": "2024-05-14" }, { "payment_means_code": "43", "payment_due_date": "2024-05-14" } ], "payment_terms_note": "dummy payment terms note (will be encryted in storage)", "allowance_charge": [ { "charge_indicator": true, "amount": 800.6 }, { "charge_indicator": false, "amount": 10 } ], "tax_total": [ { "tax_amount": 56.07, "tax_subtotal": [ { "taxable_amount": 800, "tax_amount": 8, "tax_category": { "id": "LOCAL_SALES_TAX", "percent": 2.3 } } ] } ], "legal_monetary_total": { "line_extension_amount": 340.5, "tax_exclusive_amount": 400, "tax_inclusive_amount": 430, "payable_amount": 1500000.0 }, "invoice_line": [ { "hsn_code": "CC-001", "product_category": "Food and Beverages", "discount_rate": 2.01, "discount_amount": 3500, "fee_rate": 1.01, "fee_amount": 50, "invoiced_quantity": 15, "line_extension_amount": 30, "item": { "name": "Tomato Paste", "description": "Description of the tomato paste", "sellers_item_identification": "identified as spoon by the seller" }, "price": { "price_amount": 1150, "base_quantity": 1, "price_unit": "NGN per 1" } }, { "hsn_code": "CC-001", "product_category": "Food and Beverages", "discount_rate": 2.01, "discount_amount": 3500, "fee_rate": 1.01, "fee_amount": 50, "invoiced_quantity": 15, "line_extension_amount": 30, "item": { "name": "Milo and milk", "description": "This is a beverage category", "sellers_item_identification": "identified as shovel by the seller" }, "price": { "price_amount": 9012, "base_quantity": 1, "price_unit": "NGN per 1" } } ] } ``` ## Response examples **200** ```json theme={null} { "status": true, "code": 200, "message": "Invoice signed successfully", "data": [] } ``` **400** ```json theme={null} { "status": false, "code": 400, "message": "IRN already exists.", "data": null, "error": [], "timestamp": "2025-09-23T11:09:04.747826Z" } ``` **401** ```json theme={null} { "status": false, "code": 401, "message": "Unauthorized", "data": null, "error": { "details": "invalid or missing API credentials" } } ``` ## OpenAPI ````yaml POST /api/v1/einvoice/sign openapi: 3.1.0 info: title: PASCA API version: 1.0.0 description: PASCA eInvoicing API reference servers: - url: https://test-api.pasca.co description: Sandbox - url: https://api.pasca.co description: Production security: - ApiKey: [] ApiSecret: [] - APIKey: [] APISecret: [] tags: - name: Resources - name: IRN and QR - name: Invoices - name: Transmission - name: Status and retrieval - name: Business - name: Health paths: /api/v1/einvoice/sign: post: tags: - Invoices summary: Sign Invoice requestBody: required: true content: application/json: example: business_id: '{{BUSINESS_ID}}' irn: '{{IRN}}' issue_date: '2024-05-14' invoice_type_code: '396' document_currency_code: NGN tax_currency_code: NGN invoice_kind: B2B invoice_delivery_period: start_date: '2024-06-14' end_date: '2024-06-16' order_reference: order REF IRN? billing_reference: - irn: ITW001-E9E0C0D3-20240619 issue_date: '2024-05-14' - irn: ITW001-E9E0C0D3-20240619 issue_date: '2024-05-14' dispatch_document_reference: irn: ITW001-E9E0C0D3-20240619 issue_date: '2024-05-14' receipt_document_reference: irn: ITW001-E9E0C0D3-20240619 issue_date: '2024-05-14' originator_document_reference: irn: ITW001-E9E0C0D3-20240619 issue_date: '2024-05-14' contract_document_reference: irn: ITW001-E9E0C0D3-20240619 issue_date: '2024-05-14' accounting_customer_party: party_name: Test Accounting Customer Party tin: 83526544-2627 email: test_sender@pasca.co telephone: '+23480254099000' business_description: Sample business description postal_address: street_name: 32, owonikoko street city_name: Gwarikpa postal_zone: '023401' lga: NG-AB-ANO state: NG-AB country: NG accounting_supplier_party: party_name: Dangote Group tin: 33824622-7135 email: tobi@pasca.co telephone: '+2348168527167' business_description: This is the test supplier details postal_address: street_name: 32, owonikoko street city_name: Gwarikpa postal_zone: '023401' lga: NG-AB-ANO state: NG-AB country: NG actual_delivery_date: '2024-05-14' payment_means: - payment_means_code: '10' payment_due_date: '2024-05-14' - payment_means_code: '43' payment_due_date: '2024-05-14' payment_terms_note: dummy payment terms note (will be encryted in storage) allowance_charge: - charge_indicator: true amount: 800.6 - charge_indicator: false amount: 10 tax_total: - tax_amount: 56.07 tax_subtotal: - taxable_amount: 800 tax_amount: 8 tax_category: id: LOCAL_SALES_TAX percent: 2.3 legal_monetary_total: line_extension_amount: 340.5 tax_exclusive_amount: 400 tax_inclusive_amount: 430 payable_amount: 1500000 invoice_line: - hsn_code: CC-001 product_category: Food and Beverages discount_rate: 2.01 discount_amount: 3500 fee_rate: 1.01 fee_amount: 50 invoiced_quantity: 15 line_extension_amount: 30 item: name: Tomato Paste description: Description of the tomato paste sellers_item_identification: identified as spoon by the seller price: price_amount: 1150 base_quantity: 1 price_unit: NGN per 1 - hsn_code: CC-001 product_category: Food and Beverages discount_rate: 2.01 discount_amount: 3500 fee_rate: 1.01 fee_amount: 50 invoiced_quantity: 15 line_extension_amount: 30 item: name: Milo and milk description: This is a beverage category sellers_item_identification: identified as shovel by the seller price: price_amount: 9012 base_quantity: 1 price_unit: NGN per 1 responses: '200': description: Sign Invoice (Success) content: application/json: example: status: true code: 200 message: Invoice signed successfully data: [] '400': description: Sign Invoice (Error) content: application/json: example: status: false code: 400 message: IRN already exists. data: null error: [] timestamp: '2025-09-23T11:09:04.747826Z' '401': description: Unauthorized content: application/json: example: status: false code: 401 message: Unauthorized data: null error: details: invalid or missing API credentials components: securitySchemes: ApiKey: type: apiKey in: header name: API-KEY ApiSecret: type: apiKey in: header name: API-SECRET APIKey: type: apiKey in: header name: API-KEY APISecret: type: apiKey in: header name: API-SECRET ````