Why I do not receive the transactions details in the API CHECK TRANSACTION RESPONSE?

If the TID is correct but the callertrxid is not found, you will receive a 400 error with a descriptive body. Example:

{"statusCode":null,"message":"Transaction for terminalId 02765555 not found.","appVersionStatus":"UNKNOWN"}

If the TID does not exist, you will receive a 400 error with a descriptive body. Example:

{"statusCode":null,"message":"Terminal not found.","appVersionStatus":"UNKNOWN"}

If, during the PAR calls, you enter incorrect and/or non-existent parameters, you will receive a 400 error with a descriptive body. Example:

{"statusCode":null,"message":"ContractCode not found.","appVersionStatus":"UNKNOWN"}

If the token expires, you will receive a 401 error with a descriptive body. Example:

{"errcode":"401","errmsg":"Unauthorized"}