# 3. Debt-Based

- [1. Increase Debt](https://paywall.gitbook.io/en/payment-service/17.-marketplace/3.-debt/3.-debt-based/1.-increase-debt.md): You can increase the debts of sub-merchants arising in your payments (such as shipping, discounts, etc.) when additional new costs occur.
- [2. Decrease Debt](https://paywall.gitbook.io/en/payment-service/17.-marketplace/3.-debt/3.-debt-based/2.-decrease-debt.md): In cases such as shipping fees, discounts, etc., you can decrease the debts of sub-merchants in your payments whenever needed.
- [3. Delete Debt](https://paywall.gitbook.io/en/payment-service/17.-marketplace/3.-debt/3.-debt-based/3.-delete-debt.md): In cases such as shipping fees, discounts, etc., you can delete the debts of sub-merchants in your payments whenever needed.