diff --git a/errors.go b/errors.go
index 7b2f286..e87a8cf 100644
--- a/errors.go
+++ b/errors.go
@@ -2,9 +2,12 @@ package gofortiadc
 
 import (
 	"encoding/json"
+	"errors"
 	"fmt"
 )
 
+var ErrNotFound = errors.New("not found")
+
 // List of ErrCode to ErrMsg from API path "http://myfortiadchost/api/platform/errMsg"
 var errMsg = `
 {
diff --git a/loadbalance_content_rewriting.go b/loadbalance_content_rewriting.go
index 38718c4..1e39939 100644
--- a/loadbalance_content_rewriting.go
+++ b/loadbalance_content_rewriting.go
@@ -94,7 +94,7 @@ func (c *Client) LoadbalanceGetContentRewriting(name string) (LoadbalanceContent
 		}
 	}
 
-	return LoadbalanceContentRewriting{}, fmt.Errorf("content rewriting %s not found", name)
+	return LoadbalanceContentRewriting{}, fmt.Errorf("content rewriting %s not found: %w", name, ErrNotFound)
 }
 
 // LoadbalanceCreateContentRewriting creates a new content rewriting
diff --git a/loadbalance_content_rewriting_condition.go b/loadbalance_content_rewriting_condition.go
index c670943..4993004 100644
--- a/loadbalance_content_rewriting_condition.go
+++ b/loadbalance_content_rewriting_condition.go
@@ -87,7 +87,7 @@ func (c *Client) LoadbalanceGetContentRewritingCondition(cr, mkey string) (Loadb
 		}
 	}
 
-	return LoadbalanceContentRewritingCondition{}, fmt.Errorf("content rewriting condition %s not found", mkey)
+	return LoadbalanceContentRewritingCondition{}, fmt.Errorf("content rewriting condition %s not found: %w", mkey, ErrNotFound)
 }
 
 // LoadbalanceGetContentRewritingConditionID returns a content rewriting condition ID by request
@@ -140,7 +140,7 @@ func (c *Client) LoadbalanceGetContentRewritingConditionID(cr string, obj Loadba
 		return cr.Mkey, nil
 	}
 
-	return "", fmt.Errorf("content rewriting condition ID %+v not found", obj)
+	return "", fmt.Errorf("content rewriting condition ID %+v not found: %w", obj, ErrNotFound)
 }
 
 // LoadbalanceCreateContentRewritingCondition creates a new content rewriting condition
diff --git a/loadbalance_content_routing.go b/loadbalance_content_routing.go
index 150992e..8f98dba 100644
--- a/loadbalance_content_routing.go
+++ b/loadbalance_content_routing.go
@@ -97,7 +97,7 @@ func (c *Client) LoadbalanceGetContentRouting(name string) (LoadbalanceContentRo
 		}
 	}
 
-	return LoadbalanceContentRouting{}, fmt.Errorf("content routing %s not found", name)
+	return LoadbalanceContentRouting{}, fmt.Errorf("content routing %s not found: %w", name, ErrNotFound)
 }
 
 // LoadbalanceCreateContentRouting creates a new content routing
diff --git a/loadbalance_content_routing_condition.go b/loadbalance_content_routing_condition.go
index 416cb5e..a546dd4 100644
--- a/loadbalance_content_routing_condition.go
+++ b/loadbalance_content_routing_condition.go
@@ -86,7 +86,7 @@ func (c *Client) LoadbalanceGetContentRoutingCondition(cr, mkey string) (Loadbal
 		}
 	}
 
-	return LoadbalanceContentRoutingCondition{}, fmt.Errorf("content routing condition %s not found", mkey)
+	return LoadbalanceContentRoutingCondition{}, fmt.Errorf("content routing condition %s not found: %w", mkey, ErrNotFound)
 }
 
 // LoadbalanceGetContentRoutingConditionID returns a content routing condition ID by request
@@ -136,7 +136,7 @@ func (c *Client) LoadbalanceGetContentRoutingConditionID(cr string, obj Loadbala
 		return rs.Mkey, nil
 	}
 
-	return "", fmt.Errorf("content routing condition ID %+v not found", obj)
+	return "", fmt.Errorf("content routing condition ID %+v not found: %w", obj, ErrNotFound)
 }
 
 // LoadbalanceCreateContentRoutingCondition creates a new content routing condition
diff --git a/loadbalance_pool.go b/loadbalance_pool.go
index c2f52e9..63f763d 100644
--- a/loadbalance_pool.go
+++ b/loadbalance_pool.go
@@ -90,7 +90,7 @@ func (c *Client) LoadbalanceGetPool(name string) (LoadbalancePool, error) {
 		}
 	}
 
-	return LoadbalancePool{}, fmt.Errorf("pool %s not found", name)
+	return LoadbalancePool{}, fmt.Errorf("pool %s not found: %w", name, ErrNotFound)
 }
 
 // LoadbalanceCreatePool creates a new real server pool
diff --git a/loadbalance_pool_member.go b/loadbalance_pool_member.go
index 2b8989a..336c7bf 100644
--- a/loadbalance_pool_member.go
+++ b/loadbalance_pool_member.go
@@ -106,7 +106,7 @@ func (c *Client) LoadbalanceGetPoolMember(pool, mkey string) (LoadbalancePoolMem
 		}
 	}
 
-	return LoadbalancePoolMember{}, fmt.Errorf("pool member %s in pool %s not found", mkey, pool)
+	return LoadbalancePoolMember{}, fmt.Errorf("pool member %s in pool %s not found: %w", mkey, pool, ErrNotFound)
 }
 
 // LoadbalanceGetPoolMemberID returns a real server pool member id by name
@@ -145,7 +145,7 @@ func (c *Client) LoadbalanceGetPoolMemberID(pool, name string) (string, error) {
 		}
 	}
 
-	return "", fmt.Errorf("pool member %s in pool %s not found", name, pool)
+	return "", fmt.Errorf("pool member %s in pool %s not found: %w", name, pool, ErrNotFound)
 }
 
 // LoadbalanceCreatePoolMember creates a new real server pool member
diff --git a/loadbalance_real_server.go b/loadbalance_real_server.go
index 82890a8..a8e7465 100644
--- a/loadbalance_real_server.go
+++ b/loadbalance_real_server.go
@@ -85,7 +85,7 @@ func (c *Client) LoadbalanceGetRealServer(name string) (LoadbalanceRealServer, e
 		}
 	}
 
-	return LoadbalanceRealServer{}, fmt.Errorf("real server %s not found", name)
+	return LoadbalanceRealServer{}, fmt.Errorf("real server %s not found: %w", name, ErrNotFound)
 }
 
 // LoadbalanceCreateRealServer creates a new real server
diff --git a/loadbalance_virtual_server.go b/loadbalance_virtual_server.go
index cd20cb6..fb11322 100644
--- a/loadbalance_virtual_server.go
+++ b/loadbalance_virtual_server.go
@@ -134,7 +134,7 @@ func (c *Client) LoadbalanceGetVirtualServer(name string) (LoadbalanceVirtualSer
 		}
 	}
 
-	return LoadbalanceVirtualServer{}, fmt.Errorf("virtual server %s not found", name)
+	return LoadbalanceVirtualServer{}, fmt.Errorf("virtual server %s not found: %w", name, ErrNotFound)
 }
 
 // LoadbalanceCreateVirtualServer creates a new virtual server
diff --git a/system_certificate_local.go b/system_certificate_local.go
index ef173b8..46195de 100644
--- a/system_certificate_local.go
+++ b/system_certificate_local.go
@@ -75,7 +75,7 @@ func (c *Client) SystemGetLocalCertificate(name string) (SystemLocalCertificate,
 		}
 	}
 
-	return SystemLocalCertificate{}, fmt.Errorf("local certificate %s not found", name)
+	return SystemLocalCertificate{}, fmt.Errorf("local certificate %s not found: %w", name, ErrNotFound)
 }
 
 // SystemCreateLocalCertificate creates a new local certificate
diff --git a/system_certificate_local_group.go b/system_certificate_local_group.go
index 2e88c80..5d71ddc 100644
--- a/system_certificate_local_group.go
+++ b/system_certificate_local_group.go
@@ -60,7 +60,7 @@ func (c *Client) SystemGetLocalCertificateGroup(name string) (SystemLocalCertifi
 		}
 	}
 
-	return SystemLocalCertificateGroup{}, fmt.Errorf("local certificate group %s not found", name)
+	return SystemLocalCertificateGroup{}, fmt.Errorf("local certificate group %s not found: %w", name, ErrNotFound)
 }
 
 // SystemCreateLocalCertificateGroup creates a new local certificate group
diff --git a/system_certificate_local_group_member.go b/system_certificate_local_group_member.go
index cf1732c..52d3340 100644
--- a/system_certificate_local_group_member.go
+++ b/system_certificate_local_group_member.go
@@ -68,7 +68,7 @@ func (c *Client) SystemGetLocalCertificateGroupMember(group, mkey string) (Syste
 		}
 	}
 
-	return SystemLocalCertificateGroupMember{}, fmt.Errorf("local certificate group member %s not found", mkey)
+	return SystemLocalCertificateGroupMember{}, fmt.Errorf("local certificate group member %s not found: %w", mkey, ErrNotFound)
 }
 
 // SystemCreateLocalCertificateGroupMember creates a new local certificate group member