## Zoho Billing - Product, solutions, integrations, support, and resources Index Access the complete documentation index at: https://www.zoho.com/en-ng/billing/llms.txt Use this file to discover all available documentation pages before proceeding. [Back](./) # I have associated a payment gateway to an invoice. My customer is unable to find the option to pay for it. What should I do? ![](/billing/images/ue-resources/llm-utility-menu/sparkle-ai.svg) Explore With AI ![](/billing/images/ue-resources/llm-utility-menu/dd-arrow.svg) * [Open in ChatGPT (opens in new tab)](https://chatgpt.com/?prompt=Analyze+the+content+of+https%3A%2F%2Fwww.zoho.com%2Fen-ng%2Fbilling%2Fkb%2Fpayments%2Fpay-online-invoice.html+and+understand+it+thoroughly+so+I+can+ask+questions+about+it.) * [Open in Claude (opens in new tab)](https://claude.ai/new?q=Analyze+the+content+of+https%3A%2F%2Fwww.zoho.com%2Fen-ng%2Fbilling%2Fkb%2Fpayments%2Fpay-online-invoice.html+and+understand+it+thoroughly+so+I+can+ask+questions+about+it.) * ![Copy for LLM](/billing/images/ue-resources/llm-utility-menu/copy.svg) Copy for LLM * [![View as Markdown](/billing/images/ue-resources/llm-utility-menu/md.svg) View as Markdown (opens in new tab)](/en-ng/billing/kb/payments/pay-online-invoice.md) When you email an invoice to your customer, the invoice PDF is attached to it and a link to view the invoice **(“Click to view Invoice”)** will be available in the email content. When your customer clicks on this hyperlink it will open the invoice in a new tab and will have a **Pay Now** button. Once the customer clicks on the **Pay Now** button, the list of payment options enabled for this invoice will be listed. The customer can choose the desired payment gateway and then click **Proceed to Payment** which will take him/her to the payment gateway.