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POST
/
v1
/
customers
/
business
cURL
curl --request POST \
  --url https://{base_url}/v1/customers/business \
  --header 'Authorization: <authorization>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "basic_info": {
    "business_name": "Acme Technologies Pte Ltd",
    "business_trade_name": "AcmeTech",
    "description": "AcmeTech provides software development and cloud infrastructure services.",
    "entity_type": "PRIVATE_LIMITED",
    "website": "https://acmetech.io",
    "email": "contact@acmetech.io",
    "incorporation_date": "2012-08-15",
    "phone": "+6561234567",
    "country_of_incorporation": "SGP",
    "registration_number": "201212345A",
    "tax_id": "SG-TAX-882914"
  },
  "financial_profile": {
    "purpose_id": 10,
    "business_industry_id": 1,
    "monthly_volume": 125000,
    "source_of_fund_id": 21,
    "third_party_fund_usage": false
  },
  "addresses": {
    "is_incorporated_address_same": true,
    "incorporated_address": {
      "street": "60 Robinson Road #11-01",
      "city": "Singapore",
      "state": "SG-01",
      "postal_code": "068892",
      "country": "SGP"
    },
    "physical_address": {
      "street": "60 Robinson Road #11-01",
      "city": "Singapore",
      "state": "SG-01",
      "postal_code": "068892",
      "country": "SGP"
    }
  },
  "associated_parties": [
    {
      "basic_info": {
        "first_name": "John",
        "last_name": "Doe",
        "dob": "1985-04-20",
        "email": "john.doe@acmetech.io",
        "phone": "+6587654321",
        "country_of_residence": "SGP",
        "nationality": "SGP",
        "tin": "SG-TIN-440982"
      },
      "address": {
        "street": "8 Marina Boulevard #45-01",
        "city": "Singapore",
        "state": "SG-01",
        "postal_code": "018981",
        "country": "SGP"
      },
      "ownership_info": {
        "designation": "Chief Technology Officer",
        "percentage_of_ownership": 15,
        "relationship_establishment_date": "2014-03-10"
      }
    },
    {
      "basic_info": {
        "first_name": "Jane",
        "last_name": "Smith",
        "dob": "1982-11-02",
        "email": "jane.smith@acmetech.io",
        "phone": "+6582345678",
        "country_of_residence": "SGP",
        "nationality": "SGP",
        "tin": "SG-TIN-441028"
      },
      "address": {
        "street": "10 Scotts Road #23-05",
        "city": "Singapore",
        "state": "SG-01",
        "postal_code": "228211",
        "country": "SGP"
      },
      "ownership_info": {
        "designation": "Chief Executive Officer",
        "percentage_of_ownership": 35,
        "relationship_establishment_date": "2012-08-15"
      }
    }
  ],
  "meta_data": {
    "reference": "ref-acmetech-2025"
  }
}
'
{
  "data": {
    "customer_id": "<string>",
    "tos_policies_url": "<string>"
  }
}

Documentation Index

Fetch the complete documentation index at: https://developer.fin.com/llms.txt

Use this file to discover all available pages before exploring further.

This endpoint will be deprecated on May 20, 2026. Use Create Business Customer V2 instead.

​
Important Requirements

  • Email Address: Must be all lowercase or you will receive a validation error
  • RELIANCE Verification: If you attempt to use RELIANCE verification type but it’s not enabled for your client, you will receive a 423 error with message: “RELIANCE is not available for your client”
  • Third-party Fund Usage: The third_party_fund_usage field indicates whether this customer will be moving other people’s money
  • Ownership Percentages: The total ownership percentages of all associated parties must add up to more than 0 and less than 100

Headers

​
Authorization
string
default:Bearer {{client_access_token}}
required

Body

application/json
​
verification_type
enum<string>
default:STANDARD
required
Available options:
STANDARD,
RELIANCE
​
basic_info
object
required
​
financial_profile
object
required
​
addresses
object
required
​
associated_parties
object[]
required
​
meta_data
object

Response

200 - application/json
​
data
object
required