Prepaid services
Adding a transaction to a prepaid service
Increase or decrease the balance of an existing prepaid service and save related notes.
Updated on August 27, 2026
Use this page to adjust the balance of one existing prepaid service with a new addition, deduction, or correction. The customer and service are predetermined. You need access to the active administration, an active Billnado licence, and an existing prepaid service.
General Information
| Field | Meaning and use |
|---|---|
| Client | The customer who owns the balance. This field is read-only, preventing the transaction from being linked to another customer. |
| Service | The service to which the balance applies. This field is read-only. |
| Quantity | The change posted to the existing balance. A positive value adds quantity; a negative value records usage, a deduction, or a correction. Zero is not allowed. |
| Comment | Formatted information saved with this transaction and available later in the transaction details. |
Additional Information
Use Internal note for information your organisation wants to retain with the transaction for internal follow-up. The note does not change the balance.
Save and result
Select Save to add the transaction to the displayed prepaid service. Billnado adds the quantity to the existing balance. After successful registration, a confirmation appears and you return to the details page, where the new balance and transaction are visible.
Important: a transaction cannot be reversed on this page. If you make a mistake, record a new transaction with the opposite quantity so the history is preserved.
Frequently asked questions
Why can I not change the customer or service?
You started from an existing prepaid service. The fixed fields prevent the new transaction from being linked to another combination. Use the general new-transaction page when you need a different customer or service.
What value should I use to consume five units?
Enter -5. A negative value decreases the balance; a positive value increases it.
What happens if the balance falls below zero?
The transaction is recorded and the negative balance remains visible. Check whether a correction or further invoicing is needed.