# Vendor codes

Source: https://developer.avalara.com/avatax-for-ap/wgs8434313380044/

# Vendor codes

**Endpoints/models used:** [CreateTransactionModel](https://developer.avalara.com/api-reference/avatax/rest/v2/models/CreateTransactionModel/)

Your integration must include a vendor identifier field that maps to the `customerCode` field in AvaTax. This field is typically the database key in the vendor master.

This requirement is handled through your environment backend and not directly via an AvaTax API call.