question

The device was offline (either disconnected from the internet, or our test gateway was down) when the payment was attempted and your merchant is not configured to allow offline payments. I am not sure what "the transaction was successful" means but you should certainly not be receiving a successful payment response in your POS (Update, at the time I wrote this, I was not aware you were forcing the payment offline). If you want more information you are going to have to include some more details (payment request, response, etc.)

I ran another Credit Force that had this happen. Here is the Clover Request and Response that we are receiving:

Clover request ---------------------------- {"DisableCashback":true,"TaxAmount":0,"TippableAmount":600,"AllowOfflinePayment":true,"ApproveOfflinePaymentWithoutPrompt":null,"TipAmount":0,"TipMode":2,"ForceOfflinePayment":true,"SignatureThreshold":0,"SignatureEntryLocation":2,"AutoAcceptSignature":false,"TipSuggestions":[],"DisablePrinting":true,"CardNotPresent":true,"DisableRestartTransactionOnFail":true,"Amount":600,"CardEntryMethods":36623,"VaultedCard":null,"ExternalId":"FMVHfm7XvdAQacotrbuREWmNo6QdpZci","Type":0,"DisableDuplicateChecking":false,"DisableReceiptSelection":true,"AutoAcceptPaymentConfirmations":false,"Extras":{},"RegionalExtras":{"FISCAL_INVOICE_NUMBER_KEY":"","INSTALLMENT_PLAN_KEY":""},"ExternalReferenceId":null}
Clover response ---------------------------- {"Payment":{"id":"FBMKF082HWP46","order":{"id":"9CYS7YTMH3FNJ"},"device":null,"tender":{"id":"ESSG9HYHH32M4","editable":false,"labelKey":"com.clover.tender.credit_card","label":"Credit Card","opensCashDrawer":false,"supportsTipping":false,"enabled":true,"visible":true,"instructions":null},"amount":600,"tipAmount":0,"taxAmount":0,"cashbackAmount":0,"cashTendered":null,"externalPaymentId":"FMVHfm7XvdAQacotrbuREWmNo6QdpZci","employee":{"id":"6R1ZS8HG9TAXW"},"createdTime":*********8437,"clientCreatedTime":0,"modifiedTime":0,"offline":true,"result":0,"cardTransaction":{"paymentRef":null,"creditRef":null,"cardType":1,"entryType":0,"first6":null,"last4":"5032","type":0,"authCode":null,"referenceId":null,"transactionNo":"100084","state":1,"extra":{"cvmResult":"NO_CVM_REQUIRED"},"begBalance":0,"endBalance":0,"avsResult":0,"cardholderName":null,"token":null,"vaultedCard":null},"serviceCharge":null,"taxRates":[],"refunds":null,"note":null,"lineItemPayments":null,"additionalCharges":null,"voidReason":0,"dccInfo":null,"transactionSettings":{"cardEntryMethods":36623,"disableCashBack":true,"cloverShouldHandleReceipts":false,"forcePinEntryOnSwipe":null,"disableRestartTransactionOnFailure":true,"allowOfflinePayment":true,"approveOfflinePaymentWithoutPrompt":null,"signatureThreshold":0,"signatureEntryLocation":2,"tipMode":4,"tippableAmount":600,"disableReceiptSelection":true,"disableDuplicateCheck":null,"autoAcceptPaymentConfirmations":null,"autoAcceptSignature":null,"forceOfflinePayment":true,"tipSuggestions":null,"regionalExtras":{"FISCAL_INVOICE_NUMBER_KEY":"","INSTALLMENT_PLAN_KEY":""}},"germanInfo":null,"appTracking":null,"cashAdvanceExtra":null,"transactionInfo":{"languageIndicator":null,"transactionLocale":null,"accountSelection":0,"paymentRef":null,"creditRef":null,"refundRef":null,"creditRefundRef":null,"fiscalInvoiceNumber":null,"installmentsQuantity":0,"installmentsPlanCode":null,"installmentsPlanId":null,"installmentsPlanDesc":null,"cardTypeLabel":null,"stan":0,"identityDocument":null,"batchNumber":null,"receiptNumber":null,"reversalStan":0,"reversalMac":null,"reversalMacKsn":null,"terminalIdentification":null,"merchantIdentifier":null,"merchantNameLocation":null,"maskedTrack2":null,"receiptExtraData":null,"selectedService":0,"transactionResult":0,"transactionTags":null,"txFormat":0,"panMask":null,"transactionSequenceCounter":null,"applicationPanSequenceNumber":null,"reversalReason":0,"isTokenBasedTx":false,"origTransactionSequenceCounter":null,"transactionSequenceCounterUpdate":null},"signatureDisclaimer":null,"externalReferenceId":null,"merchant":null},"IsSale":true,"IsPreAuth":false,"IsAuth":false,"Signature":null,"Success":true,"Result":0,"Reason":null,"Message":null}