Reverse General Concepts

The payment made through TAMI can be canceled on the same day (before the end of the day). In order to cancel, the order number (orderId) of the payment must be sent. Sending the amount and reason is not mandatory. If the cancellation is successful, the canceled amount will be returned from the service.

Test/Prod Envirenement API User Information

You can access the Sandbox Test Portal at https://sandbox-portal.tami.com.tr. When you log in to the test portal using a test user account, you can view the transactions performed by the merchant associated with that user. These transactions can also be cancelled or refunded. To obtain the test user credentials, please contact TeknikDestek@tami.com.tr.

Hash Calculation

The request sent for many transaction types should include the PG-Auth-Token in the header information. The PG-Auth-Token consists of the values "MerchantNumber:TerminalNumber:Hash".

When calculating the hash here, the merchantNumber, terminalNumber, and secretKey information belonging to the merchant are hashed with sha256 and converted to a string.

public class SHA256Example {\n public static String sha256(Long merchantNumber, Long terminalNumber, String secretKey) {\n String text = merchantNumber.toString() + terminalNumber.toString() + secretKey;\n try {\n MessageDigest digest = MessageDigest.getInstance(\"SHA-256\");\n byte[] hash = digest.digest(text.getBytes(StandardCharsets.UTF_8));\n String sha256Hex = DatatypeConverter.printBase64Binary(hash);\n return sha256Hex;\n } catch (NoSuchAlgorithmException e) {\n e.printStackTrace();\n return null;\n }\n }\n}

TAMİ Test Portal Information

You can access the Tami test portal at https://sandbox-portal.tami.com.tr. From this address, you can view the portal screen with the users specified above.

For your production environment information you can become a member at https://portal.tami.com.tr or You can apply to the e-commerce support unit.

Reverse Transaction API Information

In test environment, the "https://sandbox-paymentapi.tami.com.tr/payment/reverse" URL will be used.

In production environment, the "https://paymentapi.tami.com.tr/payment/reverse " URL will be used.

Reverse Transaction API Request Parameters and Descriptions

Field	Format	Maximum Size	(O)psiyonel / (M)andatory	Description
orderId	String	(2-36)	M	Is the order number of the sales transaction to be canceled.
amount	Decimal		O	It is used for partial refund requests. It should be sent when you want to return a certain part of the transaction, not the whole transaction. If empty, it takes the value of the order. The fraction separator must be made with a period (.).
reason	String	150	O	Reason for Reverse/Refund
securityHash	String		M	It is the value expected to be calculated and transmitted according in the document. If it is missing or incorrect, the transaction is not routed to the bank, an error is given.

Reverse Transaction API Request Example

{\n \"amount\":\"300\",\n \"orderId\": \"orderreverse\",\n \"securityHash\": \"648rksks99848wskkd==\"\n}

Reverse Transaction API Response Example

{\n \"amount\": 5,\n \"currency\": \"TRY\",\n \"orderId\": \"RNDxxxx\",\n \"success\": true,\n \"systemTime\": \"2025-08-09T15:52:03.030201885\",\n \"correlationId\": \"correlatxxx\",\n \"securityHash\": \"+O0Yhy5CCLkFvHWR4vtSS5b75zjPz4I03y3dDuy3mcQ=\",\n \"bankAuthCode\": \"4631xxx\",\n \"bankReferenceNumber\": \"52210430xxxx\"\n}

Reverse Transaction API Response Parameters and Descriptions

Field	Format	Description
success	String	Reports the result of the operation. If True, the operation succeeds, if False, the operation fails.
currency	String	The foreign currency code of the successful canceled/refunded transaction.
amount	Number	The foreign currency code of the successful canceled/refunded transaction.
systemTime	DateTime	Time of transaction execution
correlationId	String	The transaction number value sent by the merchant in the cancellation/refund request.
errorCode	String	This parameter is passed if the operation fails. Error code information.
errorMessage	String	This parameter is passed if the operation fails. Error message information.
orderId	String	Order number
securityHash		The value to be used to determine that the result of the operation comes from the correct source. The documentation describes how to calculate it.
bankAuthCode	String	Bank Confirmation Code
bankReferenceNumber	String	Retref number for the transaction
errorGroup	String	Shows the group of the relevant error. Businesses can manage their own rules using error codes and error groups.

POST

Merchant ID

Terminal ID

Secret Key

{\n \"orderId\": \"\",\n \"amount\": 10\n}

Hata Oluştu

Başarılı

Security Hash Calculation

You can use the documentation here to calculate the securityHash field in service requests and incoming service responses.

Error Codes

You can access the list of error codees on this page.

Test Cards

You can access the list of test cards on this page.

Sales >> Point Sale Reverse / Refund >> Refund

Multi Bank Virtual POS