diff --git a/pyrmv/__init__.py b/pyrmv/__init__.py
index f823ee7..56ccece 100644
--- a/pyrmv/__init__.py
+++ b/pyrmv/__init__.py
@@ -36,5 +36,5 @@ __license__ = "MIT License"
 __author__ = "Profitroll"
 
 from . import raw
-from .methods import *
-from .errors import *
\ No newline at end of file
+from . import errors
+from .methods import *
\ No newline at end of file
diff --git a/pyrmv/errors/api_errors.py b/pyrmv/errors/api_errors.py
new file mode 100644
index 0000000..8119d16
--- /dev/null
+++ b/pyrmv/errors/api_errors.py
@@ -0,0 +1,55 @@
+class ApiAuthError(Exception):
+    """
+    Access denied for accessId provided.
+    """
+    def __init__(self):
+        super().__init__(self.__doc__)
+
+    def __str__(self):
+        return self.__doc__
+
+class ApiQuotaError(Exception):
+    """
+    Quota exceeded for accessId provided.
+    """
+    def __init__(self):
+        super().__init__(self.__doc__)
+
+    def __str__(self):
+        return self.__doc__
+
+class ApiTooManyRequests(Exception):
+    """
+    Too many requests.
+    """
+    def __init__(self):
+        super().__init__(self.__doc__)
+
+    def __str__(self):
+        return self.__doc__
+
+class ApiParamError(Exception):
+    """Exception raised for errors in the input arguments.
+
+    ### Attributes:
+        * errorCode: Client error code from HAFAS ReST Request Errors.
+        * errorText: Description of an error occurred.
+    """
+
+    def __init__(self, errorCode: str, errorText: str):
+        self.errorCode = errorCode
+        self.errorText = errorText
+        super().__init__(self.errorText)
+
+    def __str__(self):
+        return f'{self.errorCode} -> {self.errorText}'
+
+class ApiFormatError(Exception):
+    """
+    Response format not supported.
+    """
+    def __init__(self):
+        super().__init__(self.__doc__)
+
+    def __str__(self):
+        return self.__doc__
\ No newline at end of file
diff --git a/pyrmv/errors/int_errors.py b/pyrmv/errors/int_errors.py
new file mode 100644
index 0000000..b92dde8
--- /dev/null
+++ b/pyrmv/errors/int_errors.py
@@ -0,0 +1,29 @@
+class IntError(Exception):
+    """
+    Internal RMV server error.
+    """
+    def __init__(self):
+        super().__init__(self.__doc__)
+
+    def __str__(self):
+        return self.__doc__
+
+class IntGatewayError(Exception):
+    """
+    Communication error with RMV backend systems.
+    """
+    def __init__(self):
+        super().__init__(self.__doc__)
+
+    def __str__(self):
+        return self.__doc__
+
+class IntTimeoutError(Exception):
+    """
+    Timeout during service processing.
+    """
+    def __init__(self):
+        super().__init__(self.__doc__)
+
+    def __str__(self):
+        return self.__doc__
\ No newline at end of file
diff --git a/pyrmv/errors/ps_errors.py b/pyrmv/errors/ps_errors.py
new file mode 100644
index 0000000..83ac32c
--- /dev/null
+++ b/pyrmv/errors/ps_errors.py
@@ -0,0 +1,13 @@
+class PsIncorrectParamError(Exception):
+    """
+    An invalid parameter combination was requested, i.e. the
+    defined range of stable segments encompassed all public
+    transport sections or it was attempted to search
+    forward/backward from the end/beginning of the
+    connection.
+    """
+    def __init__(self):
+        super().__init__(self.__doc__)
+
+    def __str__(self):
+        return self.__doc__
\ No newline at end of file
diff --git a/pyrmv/errors/sot_errors.py b/pyrmv/errors/sot_errors.py
new file mode 100644
index 0000000..6b2459f
--- /dev/null
+++ b/pyrmv/errors/sot_errors.py
@@ -0,0 +1,49 @@
+class SotAlreadyArrivedError(Exception):
+    """
+    Trip already arrived.
+    """
+    def __init__(self):
+        super().__init__(self.__doc__)
+
+    def __str__(self):
+        return self.__doc__
+
+class SotNotStartedError(Exception):
+    """
+    Trip not started.
+    """
+    def __init__(self):
+        super().__init__(self.__doc__)
+
+    def __str__(self):
+        return self.__doc__
+
+class SotCancelledError(Exception):
+    """
+    Trip cancelled.
+    """
+    def __init__(self):
+        super().__init__(self.__doc__)
+
+    def __str__(self):
+        return self.__doc__
+
+class SotAllTrainsFilteredError(Exception):
+    """
+    All trips filtered.
+    """
+    def __init__(self):
+        super().__init__(self.__doc__)
+
+    def __str__(self):
+        return self.__doc__
+
+class SotStayOnTripError(Exception):
+    """
+    No change. Stay on trip.
+    """
+    def __init__(self):
+        super().__init__(self.__doc__)
+
+    def __str__(self):
+        return self.__doc__
\ No newline at end of file
diff --git a/pyrmv/errors/svc_errors.py b/pyrmv/errors/svc_errors.py
new file mode 100644
index 0000000..c2073ad
--- /dev/null
+++ b/pyrmv/errors/svc_errors.py
@@ -0,0 +1,145 @@
+class SvcParamError(Exception):
+    """Exception raised for errors in the input arguments.
+
+    ### Attributes:
+        * errorCode: Client error code from HAFAS ReST Request Errors.
+        * errorText: Description of an error occurred.
+    """
+
+    def __init__(self, errorCode: str, errorText: str):
+        self.errorCode = errorCode
+        self.errorText = errorText
+        super().__init__(self.errorText)
+
+    def __str__(self):
+        return f'{self.errorCode} -> {self.errorText}'
+
+class SvcLocationError(Exception):
+    """
+    Location missing or invalid.
+    """
+    def __init__(self):
+        super().__init__(self.__doc__)
+
+    def __str__(self):
+        return self.__doc__
+
+class SvcLocationArrivalError(Exception):
+    """
+    Arrival location missing or invalid.
+    """
+    def __init__(self):
+        super().__init__(self.__doc__)
+
+    def __str__(self):
+        return self.__doc__
+
+class SvcLocationDepartureError(Exception):
+    """
+    Departure location missing or invalid.
+    """
+    def __init__(self):
+        super().__init__(self.__doc__)
+
+    def __str__(self):
+        return self.__doc__
+
+class SvcLocationViaError(Exception):
+    """
+    Unknown change stop.
+    """
+    def __init__(self):
+        super().__init__(self.__doc__)
+
+    def __str__(self):
+        return self.__doc__
+
+class SvcLocationEqualError(Exception):
+    """
+    Origin/destination or vias are equal.
+    """
+    def __init__(self):
+        super().__init__(self.__doc__)
+
+    def __str__(self):
+        return self.__doc__
+
+class SvcLocationNearError(Exception):
+    """
+    Origin and destination are too close.
+    """
+    def __init__(self):
+        super().__init__(self.__doc__)
+
+    def __str__(self):
+        return self.__doc__
+
+class SvcDatetimeError(Exception):
+    """
+    Date/time are missing or invalid.
+    """
+    def __init__(self):
+        super().__init__(self.__doc__)
+
+    def __str__(self):
+        return self.__doc__
+
+class SvcDatetimePeriodError(Exception):
+    """
+    Date/time are not in timetable or allowed period.
+    """
+    def __init__(self):
+        super().__init__(self.__doc__)
+
+    def __str__(self):
+        return self.__doc__
+
+class SvcProductError(Exception):
+    """
+    Product field missing or invalid.
+    """
+    def __init__(self):
+        super().__init__(self.__doc__)
+
+    def __str__(self):
+        return self.__doc__
+
+class SvcContextError(Exception):
+    """
+    Context is invalid.
+    """
+    def __init__(self):
+        super().__init__(self.__doc__)
+
+    def __str__(self):
+        return self.__doc__
+
+class SvcNoResultError(Exception):
+    """
+    No result found.
+    """
+    def __init__(self):
+        super().__init__(self.__doc__)
+
+    def __str__(self):
+        return self.__doc__
+
+class SvcSearchError(Exception):
+    """
+    Unsuccessful search.
+    """
+    def __init__(self):
+        super().__init__(self.__doc__)
+
+    def __str__(self):
+        return self.__doc__
+
+class SvcNoMatchError(Exception):
+    """
+    No match found.
+    """
+    def __init__(self):
+        super().__init__(self.__doc__)
+
+    def __str__(self):
+        return self.__doc__
\ No newline at end of file
diff --git a/pyrmv/errors/unknown_error.py b/pyrmv/errors/unknown_error.py
new file mode 100644
index 0000000..0f56ca6
--- /dev/null
+++ b/pyrmv/errors/unknown_error.py
@@ -0,0 +1,15 @@
+class UnknownError(Exception):
+    """Exception raised but error is not known.
+
+    ### Attributes:
+        * errorCode: Client error code from HAFAS ReST Request Errors.
+        * errorText: Description of an error occurred.
+    """
+
+    def __init__(self, errorCode: str, errorText: str):
+        self.errorCode = errorCode
+        self.errorText = errorText
+        super().__init__(self.errorText)
+
+    def __str__(self):
+        return f'{self.errorCode} -> {self.errorText}'
\ No newline at end of file
diff --git a/pyrmv/utility/__init__.py b/pyrmv/utility/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/pyrmv/utility/find_exception.py b/pyrmv/utility/find_exception.py
new file mode 100644
index 0000000..066ed8d
--- /dev/null
+++ b/pyrmv/utility/find_exception.py
@@ -0,0 +1,102 @@
+from pyrmv.errors.api_errors import ApiAuthError, ApiFormatError, ApiParamError, ApiQuotaError, ApiTooManyRequests
+from pyrmv.errors.int_errors import IntError, IntGatewayError, IntTimeoutError
+from pyrmv.errors.ps_errors import PsIncorrectParamError
+from pyrmv.errors.sot_errors import SotAllTrainsFilteredError, SotAlreadyArrivedError, SotCancelledError, SotNotStartedError, SotStayOnTripError
+from pyrmv.errors.svc_errors import SvcContextError, SvcDatetimeError, SvcDatetimePeriodError, SvcLocationArrivalError, SvcLocationDepartureError, SvcLocationEqualError, SvcLocationError, SvcLocationNearError, SvcLocationViaError, SvcNoMatchError, SvcNoResultError, SvcProductError, SvcSearchError
+from pyrmv.errors.unknown_error import UnknownError
+
+def find_exception(data: dict):
+    """Scan returned dict for errorCode from RMV.
+    Raises different exceptions if errorCode is not None. 
+
+    ### Args:
+        * data (dict): Response from RMV as a dict.
+
+    ### Raises:
+        * Any: Formatted as "errorCode -> errorText" if ApiParamError and UnknownError or as a single massage for others.
+    """    
+    if "errorCode" in data:
+
+        if data["errorCode"] == "API_AUTH":
+            raise ApiAuthError()
+
+        elif data["errorCode"] == "API_QUOTA":
+            raise ApiQuotaError()
+
+        elif data["errorCode"] == "API_TOO_MANY_REQUESTS":
+            raise ApiTooManyRequests()
+            
+        elif data["errorCode"] == "API_PARAM":
+            raise ApiParamError(errorCode=data["errorCode"], errorText=data["errorText"])
+
+        elif data["errorCode"] == "API_FORMAT":
+            raise ApiFormatError()
+
+        elif data["errorCode"] == "SVC_LOC":
+            raise SvcLocationError()
+
+        elif data["errorCode"] == "SVC_LOC_ARR":
+            raise SvcLocationArrivalError()
+
+        elif data["errorCode"] == "SVC_LOC_DEP":
+            raise SvcLocationDepartureError()
+
+        elif data["errorCode"] == "SVC_LOC_VIA":
+            raise SvcLocationViaError()
+
+        elif data["errorCode"] == "SVC_LOC_EQUAL":
+            raise SvcLocationEqualError()
+
+        elif data["errorCode"] == "SVC_LOC_NEAR":
+            raise SvcLocationNearError()
+
+        elif data["errorCode"] == "SVC_DATATIME":
+            raise SvcDatetimeError()
+
+        elif data["errorCode"] == "SVC_DATATIME_PERIOD":
+            raise SvcDatetimePeriodError()
+
+        elif data["errorCode"] == "SVC_PROD":
+            raise SvcProductError()
+
+        elif data["errorCode"] == "SVC_CTX":
+            raise SvcContextError()
+
+        elif data["errorCode"] == "SVC_NO_RESULT":
+            raise SvcNoResultError()
+
+        elif data["errorCode"] == "SVC_FAILED_SEARCH":
+            raise SvcSearchError()
+
+        elif data["errorCode"] == "SVC_NO_MATCH":
+            raise SvcNoMatchError()
+
+        elif data["errorCode"] == "INT_ERR":
+            raise IntError()
+
+        elif data["errorCode"] == "INT_GATEWAY":
+            raise IntGatewayError()
+
+        elif data["errorCode"] == "INT_TIMEOUT":
+            raise IntTimeoutError()
+
+        elif data["errorCode"] == "SOT_AT_DEST":
+            raise SotAlreadyArrivedError()
+
+        elif data["errorCode"] == "SOT_BEFORE_START":
+            raise SotNotStartedError()
+
+        elif data["errorCode"] == "SOT_CANCELLED":
+            raise SotCancelledError()
+
+        elif data["errorCode"] == "SOT_ALL_TRAINS_FILTERED":
+            raise SotAllTrainsFilteredError()
+
+        elif data["errorCode"] == "SOT_STAY_IN_CURRENT_CONNECTION":
+            raise SotStayOnTripError()
+
+        elif data["errorCode"] == "PARTIALSEARCH_INCORRECT_PARAM":
+            raise PsIncorrectParamError()
+
+        else:
+            raise UnknownError(errorCode=data["errorCode"], errorText=data["errorText"])
\ No newline at end of file