POS Payment Terminal Integration in Trinidad and Tobago
A POS application, a payment terminal and a merchant account perform separate jobs. A working integration must pass the amount to the provider, receive a confirmed result and reconcile it to the correct sale.
Identify the provider and device first
Record the merchant provider, terminal model, country of operation and accepted currencies. Ask who supplies the integration and which versions of the POS and device software it supports.
A business can record a payment made on a separate terminal after checking the terminal result. Integrated processing can transfer the amount and confirmation between systems. Confirm which arrangement is included in the quote.
Check local payment arrangements
PayWise publishes QR payments, ePOS, physical LINX terminals and online payment and invoicing services. Its developer resources describe available integrations. An available payment product still needs a specific compatibility check with the proposed POS.
Ask the provider about merchant onboarding, device costs, transaction fees, supported currencies and settlement timing. Obtain written confirmation of the supported workflow for the exact business and location.
Separate online invoices from in person terminals
Stripe publishes separate regional requirements for its Terminal product. Trinidad and Tobago is not listed in the Terminal regional index checked on 25 September 2026. An online Stripe invoicing arrangement should not be presented as proof of local Stripe reader support.
Any online payment setup also needs the correct eligible merchant entity, account configuration and supported transaction currency. The currently deployed DSDillon POS records confirmed payments; its live Stripe collection integration is unfinished.
Stripe Terminal regional requirements / Stripe hosted invoice payment page
Test payment states and duplicate protection
Demonstrate a successful payment, a decline, a pending result and a connection interruption. Repeat a submitted request and confirm that a retry cannot collect the same amount again.
Then run a partial refund and a full refund. Verify the provider reference, amount, currency and resulting customer balance. A POS screen showing paid needs to be traceable to the payment evidence.
| Event | Expected record |
|---|---|
| Success | One payment against the correct sale |
| Decline | No settled payment recorded |
| Pending | Visible status requiring follow up |
| Lost response | Safe retry or reconciliation using the original reference |
| Refund | Confirmed refund linked to the original payment |
| Settlement | Fees, conversion and net payout traceable to provider records |
Agree who resolves payment incidents
Name the support contact for the application, terminal and acquiring service. Agree how staff handle a customer whose bank shows a debit while the POS still shows a pending result.
DSDillon scopes the payment connection around those responsibilities. Provide the provider name and terminal models when requesting a POS discussion. Card details and secret keys must stay out of public messages.
Questions before you decide
Does the POS software itself give me a merchant account?
A merchant account is established with the payment provider under its eligibility and onboarding requirements. Confirm that arrangement separately from the POS software licence.
Does a recorded Stripe reference mean the POS verified the payment?
A manually entered reference is an owner recorded payment. Automatic verification requires an active provider connection and reconciliation workflow.
Tell us how your business sells.
Share your business type, locations, currencies, invoice requirements and payment providers. We will scope the workflow, connections and acceptance tests.
