By Elena Torres, merchant-support lead with 8 years of card-payment operations experience
Last reviewed: July 30, 2026
Finix lets approved businesses collect money through payment links, invoices, a Virtual Terminal and integrated checkout tools. After a payment is captured, merchants can issue a full or partial refund, but an authorization that has not been captured should usually be voided instead. This independent guide is not operated by or affiliated with Finix.
Do not use the refund workflow after a card dispute has already opened. Finix blocks ordinary refunds and reversals on disputed transactions, so the merchant must handle the case through the dispute record.
What Finix payment tools are available?
Finix is a payment processor for direct merchants, software platforms and marketplaces. Its no-code tools include Payment Links, invoices and a Virtual Terminal, while developers can use Finix APIs to build checkout, subscriptions and embedded-payment functions.
Each tool solves a different collection problem.
| Finix tool | Best fit |
|---|---|
| Payment Link | Sending a reusable or one-time checkout URL |
| Invoice | Requesting and tracking a specific amount due |
| Virtual Terminal | Entering a payment from the Finix Dashboard |
| Subscription | Charging a fixed amount on a recurring schedule |
| Integrated checkout | Collecting payments inside a website or software product |
A Payment Link can be shared through a URL, QR code, email or text. Finix says merchants can add branding, product information, pricing and images, then track payments associated with the link.
The Virtual Terminal works differently. It allows an authorized Dashboard user to accept card payments without sending the buyer to an external checkout page.
Invoices add an accounts-receivable layer. They can move through payment and cancellation states, including partial-payment scenarios that require separate handling when money has already been collected.
Choose the tool according to the transaction. Skip the invoice workflow when all you need is a reusable product checkout link.
What is the difference between a void and a refund?
A void stops an authorization before the associated payment has been completed. A refund returns money after a payment has already been captured.
This timing difference matters because card payments can have two stages:
- Authorization reserves or confirms the available amount.
- Capture completes the payment and creates the transfer of funds.
Finix documents that authorizations can be voided to release the reserved funds and prevent the transaction from completing. Captured transfers cannot be voided in the same way; they must be refunded or reversed.
Use this decision rule:
| Transaction condition | Correct action |
| Authorized but not captured | Void the authorization |
| Captured and no dispute exists | Issue a refund |
| Part of the amount should be returned | Issue a partial refund |
| Cardholder dispute already exists | Use the dispute workflow |
| Invoice has partial payments | Close the invoice separately and refund collected payments as needed |
A buyer may see a pending authorization after a void while the issuing bank updates the account. Finix does not publish one universal disappearance time because card issuers control how pending authorizations appear to their customers.
Void first when capture has not occurred. Skip a completed refund because it creates a second funds movement instead of simply stopping the original transaction.
How do Finix refunds work?
Finix permits merchants to refund online and card-present payments through the Dashboard or API. Its documentation also provides device-specific refund methods for supported standalone terminals and the D135 Checkout App.
A refund creates a reversal-type funds flow. Finix’s resource definitions use REVERSAL for money returned to customers through refunds or chargebacks, while a normal captured payment is represented by a debit-type transfer.
Merchants can generally refund the entire payment or only part of it. A partial refund is appropriate when the customer keeps some products or services and only a portion of the original charge should be returned.
The customer does not normally receive the money at the exact moment the merchant submits the refund. Finix processes the reversal, but the issuing bank determines when the credit becomes visible on the cardholder’s statement or available balance. Timing consequently varies by bank and card network.
A merchant also needs sufficient settlement funds or an arrangement that permits the refund amount to be recovered from future settlements. The exact treatment depends on the Finix account and agreement.
Before submitting the refund, inspect three details:
- The original payment amount
- Any refunds already recorded
- Whether a dispute has opened
That last check prevents a common failure.
Why is the refund option unavailable?
A refund can fail or be blocked when the payment is already disputed, the requested amount exceeds what remains refundable, or the transaction state does not support the selected action.
Finix documents a 409 conflict response when a user attempts to refund or reverse a payment that already has a dispute. Its message states that refunds and reversals are not allowed on disputed transactions.
The dispute has already caused a separate reversal process through the issuing bank. Creating another refund could return the same money twice.
Other practical causes include:
- A full refund was already issued.
- Prior partial refunds leave less available than the amount requested.
- The payment was only authorized and should be voided.
- The transaction has not reached a refundable state.
- The user’s Dashboard role lacks the required permission.
- The merchant is viewing the wrong environment or account.
Prioritize the payment status and refund history. Skip repeated button attempts when Finix has returned a state-based error.
For API integrations, the returned HTTP status and response body should be preserved in internal logs. Finix uses HTTP response codes to distinguish successful requests from errors, although card-network communication and terminal interaction can affect response time.
How do Payment Links work?
Payment Links let a merchant create a hosted checkout request in the Finix Dashboard without building a custom payment page. The merchant can configure the amount or product information, apply branding and share the resulting link with buyers.
Links can be distributed through:
- Text message
- A website
- Social or messaging channels
- A QR code
- A direct one-to-one customer message
Finix describes payment links as suitable for one-time customer purchases or links that multiple buyers can reuse.
That flexibility creates one operational concern. A reusable link should not contain wording implying that it belongs exclusively to one customer when anyone possessing the URL can open it.
Payment Links are closer to hosted checkout pages than formal invoices. They are useful when the merchant wants fast collection and does not need a detailed accounts-receivable lifecycle.
An invoice is better when the business needs a specific recipient, due amount, payment history or status such as void or uncollectible.
Can Finix send invoices?
Yes. Finix provides a no-code invoicing system with defined payment and cancellation states. Invoices can receive full or partial payments and can be voided or marked uncollectible.
The treatment of existing payments is important.
If an unpaid invoice is voided, no customer funds need to be returned. If the invoice has already received a partial payment, voiding or marking the invoice uncollectible does not automatically refund the amount collected. Finix says those payments must be refunded separately.
That produces two records:
- The invoice status, showing that no more money is expected.
- The payment refund, showing what happened to money already collected.
Do not assume closing an invoice reverses its transactions.
This separation is useful for accounting. A business may close the remaining balance as uncollectible while retaining a legitimate partial payment, or it may decide to refund the partial payment as well. The invoice and transaction records need to show those decisions separately.
Finix’s public documentation does not present invoices as a full bookkeeping system. Businesses may still need to reconcile invoice records with their accounting software and bank settlements.
Does Finix support recurring payments?
Finix supports subscriptions for recurring charges to cards or bank-account payment instruments. A subscription represents a fixed charge collected at regular intervals, and merchants can create subscriptions directly or use a Subscription Plan.
The documentation says subscriptions are supported for merchants in the United States and Canada.
Recurring billing is different from repeatedly sharing the same Payment Link. A subscription creates an ongoing payment schedule tied to a saved payment instrument, while a reusable link requires the buyer to complete checkout again.
Before using subscriptions, confirm:
- The billing interval
- Start and end conditions
- Customer authorization
- Cancellation process
- Failed-payment handling
- Refund policy
- Applicable account pricing
Finix markets no-code recurring billing, but available features and commercial terms can depend on the merchant or platform configuration.
What does Finix charge?
Finix publishes direct-merchant pricing that starts at $250 monthly for its standard processing subscription tier. The same page lists card-present processing at $0.08 per transaction, card-not-present processing at $0.15 per transaction, and American Express processing at 0.30% per transaction, in addition to applicable interchange and card-network fees under the displayed standard structure.
Finix offers custom pricing for businesses processing more than $1 million annually.
These figures are official published starting terms for direct merchants, not a universal quote for platforms, marketplaces or every feature. Platform pricing has its own page and can differ according to payment volume, merchant structure and enabled capabilities.
Finix explains that payment cost can include interchange, card-network assessments and processor markup. It supports several pricing models, including interchange-plus, flat-rate, tiered and subscription approaches.
A refund can also have an economic cost even when the original payment amount is returned to the buyer. The merchant agreement determines whether processing charges are returned, retained or supplemented by a refund fee.
Do not infer that a refunded sale restores every original charge. Check the pricing schedule attached to the account.
What happens if the buyer files a dispute?
A dispute begins when the cardholder challenges the transaction through the issuing bank. Finix creates a Dispute record, debits the disputed amount from the merchant through a settlement and displays the response deadline and reason information.
The merchant can accept the dispute or respond with supporting evidence. Finix describes representment as submitting the transaction again through the card-network process with evidence supporting the charge. Response windows often fall between 7 and 20 days, depending on the card network and reason code.
Missing the displayed deadline can result in an automatic loss.
A refund and a dispute are not interchangeable:
| Refund | Dispute |
| Initiated by the merchant | Initiated through the cardholder’s bank |
| Usually reflects an agreed return | Reflects a challenged transaction |
| Merchant chooses full or partial amount | Issuer and network control the case process |
| No evidence package normally needed | Evidence may be submitted |
| Occurs before or without a chargeback | Can result in a chargeback |
Once a dispute exists, use that record. Do not promise a separate refund while the same funds are already being contested.
Finix FAQ
Can Finix create payment links?
Yes. Payment Links can be created in the Finix Dashboard and shared through a URL, QR code, email or text.
Can a Finix refund be partial?
Yes. Finix supports full and partial refunds for eligible captured payments.
Should I void or refund a pending payment?
Void an uncaptured authorization. Refund a captured payment.
Why can’t I refund a disputed payment?
Finix blocks ordinary refunds and reversals after a dispute exists because the issuing-bank dispute process is already handling the challenged funds. The documented API response is a 409 conflict.
Does voiding a partially paid invoice return the payment?
No. Finix says payments already collected must be refunded separately, even when the invoice itself is voided or marked uncollectible.
Does Finix offer recurring billing?
Yes. Finix supports subscriptions that charge cards or bank accounts on a recurring schedule for eligible U.S. and Canadian merchants.
How much does Finix cost for direct merchants?
The official direct-merchant page lists a standard subscription starting at $250 monthly, plus published per-transaction processing charges and applicable interchange and card-network fees. Custom pricing applies to some larger businesses and configurations.
The practical order is to inspect the transaction state, choose void or refund according to whether capture occurred, and move to the dispute record immediately when the issuing bank has already opened a case.