Getting a invalid credit card number when trying to issue a refund in Sandbox

[jasonm89]

Hello, I'm having an issue testing refunds in the sandbox environment. I am creating successful transactions and getting back these attributes:

transId = 0 

accountNumber = XXXX1111 

But when I go to refund the transaction

request.transactionRequest = TransactionRequestType.new()
request.transactionRequest.amount = amount.round(2)
request.transactionRequest.payment = PaymentType.new
request.transactionRequest.payment.creditCard = CreditCardType.new('1111', 'XXXX')
request.transactionRequest.refTransId = 0
request.transactionRequest.transactionType = TransactionTypeEnum::RefundTransaction
@transaction.create_transaction(request)

I am getting back this error: "The credit card number is invalid."

Any idea why this isn't working?

Also, I cannot get transaction details for the transId 0

[rhldr · Accepted solution]

@jasonm89  Your sandbox account is in test mode.  If you switch to live mode, you'll get a valid transaction id which you can then use to void or refund a test transaction.