Custom Payment Methods

Custom Payment Methods let you accept payments through your own manual or external process while still tracking the order inside SellApp. They are useful when your preferred local wallet, bank transfer, private processor, or manual crypto flow is not available as a native integration.

Use them for any payment process where SellApp should create a pending order for you to verify before digital product delivery is completed.

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Create a custom processor

Open Payment settings, then open Custom Processors and click Add method.

Choose one of two processor flows:

1. Instruction-based: SellApp shows payment instructions on checkout.
2. Redirect-based: SellApp sends the customer to your own payment page.

Then add the payment method name, optional icon, and the details for that flow.

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Instruction-based methods

Use instruction-based methods when the customer should read payment details on the SellApp checkout page.

You can add:

1. A short description.
2. Rich instructions.
3. Up to three checkout steps.
4. Proof of payment upload.
5. A customer preview before saving.

If proof is required, the customer can submit text or a screenshot. The order will stay pending until you review it.

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Redirect-based methods

Use redirect-based methods when you already have a hosted payment page.

Add a redirect URL and include variables when your external flow needs order context. SellApp supports variables like:

1. {id}
2. {invoice_id}
3. {customer_email}
4. {currency}
5. {price}
6. {price_usd}
7. {product_name}
8. {quantity}

For example, your redirect URL might include the order ID and price so your external page can prefill the checkout.

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Enable on products

When saving a custom processor, you can enable it on all current products. You can also control custom payment methods per variant from the product editor.

Custom processor orders require manual review. Open the order, confirm payment, then mark it completed when the payment is valid. Keep the instructions clear so customers know exactly where to pay, what proof to upload, and when they should expect their order to be reviewed.