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GullySystem

Payment Gateway Integration for Card, Wallet and Bank Payments

Payment gateway integration connects card, wallet or bank transfer collections to your billing system. Payments match invoices, settlements reconcile, and refunds update the same record.

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What a gateway cannot answer alone

A gateway confirms that money arrived. It does not say which invoice a payment was for. It cannot say whether the bank settlement matches what customers paid, or how a part-refund agreed by phone should be recorded. Accounts answers these by opening the gateway dashboard beside a list of pending invoices and matching the two by eye, one payment at a time. Integration moves each answer into your system.

What the connection handles

Links and QR codes

An invoice or order raises its own payment link or QR code, sent through the channel the customer already uses.

Confirmation and matching

A successful payment marks the right invoice, using a reference that holds up for partial and split amounts.

Settlement reconciliation

Daily settlement files are compared with what your system expected, and any difference between collected and credited amounts is flagged.

Refunds and failures

Refunds raised in your system reach the gateway. The resulting status is written back onto the invoice.

Details that shape the build

  • Whether one gateway is in use or several, since a second is often kept as backup
  • How part-payments, part-refunds and disputed transactions should behave
  • Whether links expire and regenerate on their own
  • How gateway fees are posted against each transaction in your books
FAQ

Frequently asked questions

Can more than one payment gateway be integrated at once?

Yes. Two gateways can run together, and each transaction is handled against the gateway it came through. Nothing is mixed up.

What if a payment succeeds but the customer’s connection drops?

The gateway’s webhook and a status check are used together, so the payment is still recorded. Relying on a single notification is what leaves such payments unmatched.

How are gateway fees recorded?

Fees are read from the settlement data and posted against the transaction. Your books then show the net amount received without a manual calculation.

Do refunds still need approval?

That is your rule to set. The flow follows your existing approval practice, whether that is automatic below a limit or sign-off every time.

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