# Error 121: Invalid Business Code

PayMe's message with `language: "en"`: **The business code is invalid, Please enter only numbers**

`seller_inc_code` isn't a positive number. `status_additional_info` is `seller_inc_code`.

## Usual causes

- Letters or punctuation in the business number. The sandbox answered HTTP 500 for `ABC`.

## What to do

- Send digits only. See [Seller Onboarding](/agents/steps/seller-onboarding).

The full list of codes is on [Errors](/payments/getting-started/errors). If something else is going on, see [Troubleshooting by Symptom](/agents/errors/troubleshooting).