## Zoho Billing - Product, solutions, integrations, support, and resources Index

Access the complete documentation index at:
https://www.zoho.com/es-mx/billing/llms.txt

Use this file to discover all available documentation pages before proceeding.

# Transactions

*   [If I have to configure a payment gateway, what are the pre-requisites?](/es-mx/billing/kb/transactions/payment-gateway-pre-requisites.html)
*   [Do you support one time transactions?](/es-mx/billing/kb/transactions/one-time-transactions.html)
*   [Do I need to change my payment gateway or can I continue with the existing one?](/es-mx/billing/kb/transactions/pg-continue.html)
*   [How do I refund a credit note?](/es-mx/billing/kb/transactions/refund.html)
*   [If my customer pays his invoice via ACH payment will it get closed automatically?](/es-mx/billing/kb/transactions/ach.html)
*   [Can my customers enter their bank details directly for ACH transactions?](/es-mx/billing/kb/transactions/bank-details.html)
*   [Does Zoho Billing store customer’s credit card details?](/es-mx/billing/kb/transactions/creditcard.html)
*   [How will I update my customer’s card if it gets expired?](/es-mx/billing/kb/transactions/customer-update.html)
*   [How to record payment for offline subscriptions?](/es-mx/billing/kb/transactions/offline.html)
*   [How to enable excess payments to apply automatically?](/es-mx/billing/kb/transactions/excess-payments.html)
*   [How do I make a refund?](/es-mx/billing/kb/transactions/refund-make.html)
*   [What is the difference between credit notes and excess payments?](/es-mx/billing/kb/transactions/excess-credits.html)
*   [Can I import and export credit card details?](/es-mx/billing/kb/transactions/import-export.html)