# POST /Indoor/api/createFollowUpByMainCustomerNumber

**Resource:** [Collections and legal follow-up](../resources/Collections-and-legal-follow-up.md)
**Service that closes customer cards based on customer number and forwards the customer to the Legal Follow-Up queue**
**Operation ID:** `createFollowUpByMainCustomerNumber`

Creates a follow-up for a corporate customer using MainCustomerNumber. Validates customer exists and is corporate. Cancels active main cards (excluding supplementary and already bank-cancelled cards) by calling ChangeCardStatus on each. Finally, creates follow-up queue entry using MainCustomerNumber and Channel.

## Request Body

Create Follow Up By Main Customer Number Request

**Required:** Yes

**Content Types:** `application/json`

**Schema:** [CreateFollowUpByMainCustomerNumberRequest](../schemas/Create/CreateFollowUpByMainCustomerNumberRequest.md)

## Responses

| Status | Description |
|--------|-------------|
| 200 | Success |
| 400 | (reference) |
| 404 | (reference) |
| 500 | (reference) |

