| EU1 | End user session timed out |
| EU2 | End user IP address mismatch |
| EU3 | Invalid session id |
| EU4 | Missing session id |
| FI11 | Missing or invalid Bank Routing Number |
| FI12 | Missing or invalid Bank Account Number |
| FI13 | Missing or invalid Bank Name |
| FI14 | Insufficient Funds |
| TR01 | The credit card has expired. |
| TR02 | Card temporarily invalid or under suspicion of fraud. |
| TR03 | Operation not permitted for this card or terminal. |
| TR04 | Insufficient funds available. |
| TR05 | Card not registered. |
| TR06 | Card out of service. |
| TR07 | Error in authentication of the holder. |
| TR08 | Refusal without specifying the reason. |
| TR09 | Erroneous expiry date. |
| TR10 | Card temporarily invalid or under suspicion of fraud with removal of the card. |
| TR11 | Issuing entity not available. |
| TR12 | Transaction refused. |
| TR13 | Transaction cannot be processed. Fraud score is too high. |
| TR14 | Transaction cannot be processed. High risk country. |
| TR15 | Transaction cannot be processed. E-mail address is a suspicious credit card fraudster. |
| TR16 | Transaction cannot be processed. Credit card issue country and customer country does not match. |
| TR17 | Transaction cannot be processed. Same amount has already been charged from this card today. |
| TR18 | Transaction cannot be processed. Credit card issue country does not match customer country. |
| TR19 | Incomplete or invalid transaction. |
| TR20 | Bank system is busy, please try again later. |
| TR21 | Transaction cannot be processed. Maximum number of transactions has been reached |
| TR30 | Transaction inserted into database. |
| TR31 | Transaction updated. |
| TR32 | Merchant total amount increasing limit has been reached. |
| TR33 | Merchant IP address not registered |
| TR34 | Transaction timed out |
| TR35 | Failed to log in with the verification code for three times and is blacklisted |
| TR36 | Credit card number is blacklisted. |
| TR37 | Transaction cannot be processed. Fraud score of this machine is too high. |
| TR38 | Bin number is blacklisted. |
| TR39 | End user IP Address is blacklisted. |
| TR40 | Bank Issuing Country is blacklisted. |
| TR41 | User fingerprint is blacklisted |
| TR42 | End user IP is denied |
| TR43 | IP address country does not match billing address country |
| TR44 | User accesses from an anonymous proxy |
| TR45 | User accesses from a transparent proxy |
| TR46 | User accesses from an open proxy |
| TR47 | Users spam score is too high |
| TR48 | Users fraud score is too high |
| TR49 | Users BIN match failed |
| TR50 | Users BIN name match failed |
| TR51 | Account owner and card owner mismatch |
| TR52 | Transactions cannot be processed. |
| Time | interval between them is too short. (To avoid double billing) |
| TR53 | User email is blacklisted |
| E1 | This merchant id is not registered in our system. |
| E2 | The merchant is not active. |
| E3 | The merchant is not set to use the direct entry point. |
| E4 | The merchant account does not exist. |
| E5 | The merchant account is not active. |
| E10 | The checksum submitted is invalid. |
| E11 | One or more required fields are missing. |
| E12 | Invalid Credit Card type |
| E13 | Invalid Credit Card number |
| E14 | Invalid expiration date. |
| E15 | Credit Card Expired. |
| E16 | Credit Card Insert failed. |
| E17 | Incorrect format of the cards control number CVV2 |
| E20 | The Country field must be in ISO-3166-1-alpha-2 format. |
| E21 | We do not process customers in this country. |
| E22 | Email is not a valid E-mail address. |
| E23 | The fees could not be retrieved. |
| E24 | SSN is not exactly four characters long. |
| E25 | SSN is not numeric. |
| E26 | Birthday is not a valid date, Must be exactly 6 digits in the format MMDDYY. |
| E27 | The Address Verification System check failed. The customer identity could not be verified. |
| E28 | The amount must be in Integer format. |
| E29 | The amount is too big. Please try a lower amount. |
| E30 | Limit check failed. |
| E31 | Customer's daily limit exceeded. |
| E32 | Customer's weekly limit exceeded. |
| E33 | Customer's monthly limit exceeded. |
| E34 | The amount (Amount) does not match the minimum requirements. |
| E35 | The amount must be greater than zero. |
| E40 | Error contacting the bank. |
| E41 | Card payment: Error upon authorization, or no contact with the bank. |
| E42 | Card payment: Purchase rejected at the bank, contact the bank. |
| E43 | Technical error |
| E44 | Technical error Netlog system |
| E45 | Technical error bank system |
| E50 | The function (Order Administration) is not supported. |
| E51 | This transaction does not exist. |
| E52 | Supplied Merchant order does not match the Netlog id. |
| E53 | Incorrect Merchant order. |
| E54 | Transaction already registered and paid. This Merchant order is already registered on another transaction. |
| E55 | The status of the transaction does not permit the operation. |
| E56 | The transaction has been cancelled. |
| E57 | The transaction has been discontinued by the purchaser or denied by the bank. |
| E58 | Refunding failed. |
| E59 | Authorization Reversal could not be carried out. |
| E60 | Acquiring could not be carried out (capture). |
| E61 | Failed unknown reason. |
| E71 | Merchants daily limit exceeded. |
| E72 | Merchants weekly limit exceeded. |
| E73 | Merchants monthly limit exceeded. |
| E74 | Merchant does not belong to Aggregating Merchant. |
| ES1 | Merchant is not set up for the hosted environment. |
| ES2 | Invalid callback type specified for hosted environment. |
| ES3 | Invalid callback type specified for API environment. |
| ES4 | Initial amount invalid. |
| ES5 | Invalid Initial Time Unit. |
| ES6 | Invalid initial Time Period Length. |
| ES7 | Invalid Rebill Time Unit. |
| ES8 | Invalid Rebill Time Period Length. |
| ES9 | Initial period Specified, but no rebilling. |
| ES10 | Invalid One Time Billing time Period Length. |
| ES11 | Invalid One Time Billing Time Unit. |
| ES12 | One Time Billing Period Specified and Rebilling at the same time is illogical. |
| ES13 | Missing success URL. |
| ES14 | Missing merchant id. |
| ES15 | Missing transaction id. |
| ES16 | Invalid Transaction amount. |
| ES17 | Invalid initial amount. |
| ES18 | Invalid Transaction Currency. |
| ES22 | Missing or invalid API version. |
| ES23 | Invalid Merchant specified. |
| ES24 | Rebilling API invoked with rebilling period and/or period length missing. |
| ES25 | Missing first name. |
| ES26 | Missing last name. |
| ES27 | Missing address line. |
| ES28 | Missing Social Security Number. |
| ES29 | Missing city. |
| ES30 | Missing country. |
| ES31 | Missing state. Required when processing US cardholders. |
| ES32 | Missing phone number. |
| ES33 | Invalid phone number format. |
| ES34 | Missing mobile phone number. |
| ES35 | Invalid mobile phone number format. |
| ES36 | Missing email address. |
| ES37 | Missing amount. |
| ES38 | Missing credit card type. |
| ES39 | Missing credit card number. |
| ES40 | Missing expiry month. |
| ES41 | Expiry month must be numeric and contain two characters. |
| ES42 | Missing expiry year. |
| ES43 | Expiry year must be numeric and contain two characters. |
| ES44 | Missing CVV2. |
| ES45 | Missing IP address. |
| ES46 | Missing checksum. |
| ES47 | Missing zip code. |
| ES48 | Missing birthday. |
| ES49 | Invalid IP address. |
