@shipengine/connect-carrier-api/src/models/bill-to.ts

This is the typescript/javascript definitions for carrier api

import { AddressBase } from './addresses';
import { BillToParty } from './billing';

/**
 * @description Bill to is a generic object used for billing a part of the shipment, duties, taxes, or otherwise to a party
        other than the shipper (the shipper is considered the default party responsible). Ref: BillTo extends AddressBase.
        since address fields are often required when associating billing to
        another account.  Additionally, this allows for a contact to be specified, if necessary.
 */
export class BillTo extends AddressBase {
  /** @description The bill_to_party mentions the type of billing option*/
  bill_to_party?: BillToParty;
  /** @description Specified if there is an account number associated with the Bill To Party, and the Bill To Party is not the account holder. */
  account_number?: string;
}