Deposit Accounts

Account Numbers

Deposit accounts, as with all COS account numbers, are globally unique within the bank. Deposit account numbers are 10 digits in length and follow this format:

2 [8 digit random number] [check digit]

Note: All master deposit accounts within COS start with the numeral "2".


Account Check Digit

All COS accounts use a luhn check digit to validate the other digits in the account number. For more information on the luhn algorithm click here.

Once an account number has been provisioned it cannot be reassigned to another customer.

Account Opening

In order to open a deposit account, a valid product ID and previously onboarded customer record is required. Note that the customer is required to have at least one address and phone record, and its OFAC status must be Clear. In addition, the classification of the customer must match the configured classification for the product. For example, only business customers can be added to a business product.

POST /core/v1/dda/accounts
  "customerId": "00000000-0000-0000-0000-000000000000",
  "productId": "00000000-0000-0000-0000-000000000000",
  "title": "John Smith",
  "statementAddress": {
    "street1": "123 Maple Street",
    "street2": "Unit 123",
    "city": "New York",
    "state": "NY",
    "postalCode": "10025",
    "countryCode": "US"

Upon account opening, the status will be Active and immediately ready to transact.