diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7a8075a1..17398118 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,12 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/) and this p
 
 - `es-verifactu-v1`: added initial Spain VeriFactu addon.
 
+## [v0.206.1] - 2024-11-28
+
+### Fixed
+
+- `org`: Party validation now working with regimes when defined.
+
 ## [v0.206.0] - 2024-11-26
 
 ### Added
diff --git a/examples/gr/invoice-b2c.yaml b/examples/gr/invoice-b2c.yaml
index 517c6018..d59cefaf 100644
--- a/examples/gr/invoice-b2c.yaml
+++ b/examples/gr/invoice-b2c.yaml
@@ -13,7 +13,7 @@ tax:
 supplier:
   tax_id:
     country: "EL"
-    code: "728089281"
+    code: "177472438"
   name: "Ελληνικά Τρόφιμα Α.Ε."
   emails:
     - addr: "hellenicfoods@example.com"
@@ -33,15 +33,10 @@ lines:
     taxes:
       - cat: VAT
         rate: standard
-  - quantity: 1
-    item:
-      name: "Cleaning"
-      price: "8.44"
-    taxes:
-      - cat: VAT
-        rate: reduced
 
 payment:
+  instructions:
+    key: card
   advances:
     - key: card
       percent: "100%"
diff --git a/examples/gr/invoice-el-el.yaml b/examples/gr/invoice-el-el.yaml
index a79c0df5..768cb187 100644
--- a/examples/gr/invoice-el-el.yaml
+++ b/examples/gr/invoice-el-el.yaml
@@ -11,7 +11,7 @@ $tags:
 supplier:
   tax_id:
     country: "EL"
-    code: "728089281"
+    code: "177472438"
   name: "Ελληνικά Τρόφιμα Α.Ε."
   emails:
     - addr: "hellenicfoods@example.com"
@@ -42,19 +42,22 @@ lines:
       name: "Υπηρεσίες Ανάπτυξης"
       price: "90.00"
       unit: "h"
+      ext:
+        "gr-mydata-income-cat": "category1_3"
+        "gr-mydata-income-type": "E3_561_001"
     discounts:
       - percent: "10%"
         reason: "Ειδική Έκπτωση"
     taxes:
       - cat: VAT
         rate: standard
-        ext:
-          "gr-mydata-income-cat": "category1_1"
-          "gr-mydata-income-type": "E3_106"
   - quantity: 1
     item:
       name: "Tax exempt item"
       price: "100.00"
+      ext:
+        "gr-mydata-income-cat": "category1_3"
+        "gr-mydata-income-type": "E3_561_001"
     taxes:
       - cat: VAT
         rate: exempt
diff --git a/examples/gr/invoice-islands.yaml b/examples/gr/invoice-islands.yaml
index 0ea571f4..165a6d8b 100644
--- a/examples/gr/invoice-islands.yaml
+++ b/examples/gr/invoice-islands.yaml
@@ -11,7 +11,7 @@ $tags:
 supplier:
   tax_id:
     country: "EL"
-    code: "728089281"
+    code: "177472438"
   name: "Ελληνικά Τρόφιμα Α.Ε."
   emails:
     - addr: "hellenicfoods@example.com"
diff --git a/examples/gr/out/invoice-b2c.json b/examples/gr/out/invoice-b2c.json
index c66783a6..ef370249 100644
--- a/examples/gr/out/invoice-b2c.json
+++ b/examples/gr/out/invoice-b2c.json
@@ -4,7 +4,7 @@
 		"uuid": "8a51fd30-2a27-11ee-be56-0242ac120002",
 		"dig": {
 			"alg": "sha256",
-			"val": "7b1f15e3697d8d68d22caa0557078fc772e90ddcff058712f0cbab0013e5c08f"
+			"val": "e0933613d76459243623c7f1c78dc0665214e06f6649113b7ccd4530e04d1948"
 		}
 	},
 	"doc": {
@@ -31,7 +31,7 @@
 			"name": "Ελληνικά Τρόφιμα Α.Ε.",
 			"tax_id": {
 				"country": "EL",
-				"code": "728089281"
+				"code": "177472438"
 			},
 			"addresses": [
 				{
@@ -69,26 +69,6 @@
 					}
 				],
 				"total": "8.44"
-			},
-			{
-				"i": 2,
-				"quantity": "1",
-				"item": {
-					"name": "Cleaning",
-					"price": "8.44"
-				},
-				"sum": "8.44",
-				"taxes": [
-					{
-						"cat": "VAT",
-						"rate": "reduced",
-						"percent": "13%",
-						"ext": {
-							"gr-mydata-vat-rate": "2"
-						}
-					}
-				],
-				"total": "8.44"
 			}
 		],
 		"payment": {
@@ -97,16 +77,22 @@
 					"key": "card",
 					"description": "Prepaid amount",
 					"percent": "100%",
-					"amount": "20.01",
+					"amount": "10.47",
 					"ext": {
 						"gr-mydata-payment-means": "7"
 					}
 				}
-			]
+			],
+			"instructions": {
+				"key": "card",
+				"ext": {
+					"gr-mydata-payment-means": "7"
+				}
+			}
 		},
 		"totals": {
-			"sum": "16.88",
-			"total": "16.88",
+			"sum": "8.44",
+			"total": "8.44",
 			"taxes": {
 				"categories": [
 					{
@@ -120,26 +106,17 @@
 								"base": "8.44",
 								"percent": "24%",
 								"amount": "2.03"
-							},
-							{
-								"key": "reduced",
-								"ext": {
-									"gr-mydata-vat-rate": "2"
-								},
-								"base": "8.44",
-								"percent": "13%",
-								"amount": "1.10"
 							}
 						],
-						"amount": "3.13"
+						"amount": "2.03"
 					}
 				],
-				"sum": "3.13"
+				"sum": "2.03"
 			},
-			"tax": "3.13",
-			"total_with_tax": "20.01",
-			"payable": "20.01",
-			"advance": "20.01",
+			"tax": "2.03",
+			"total_with_tax": "10.47",
+			"payable": "10.47",
+			"advance": "10.47",
 			"due": "0.00"
 		}
 	}
diff --git a/examples/gr/out/invoice-el-el.json b/examples/gr/out/invoice-el-el.json
index 6cb69e6b..6866ae36 100644
--- a/examples/gr/out/invoice-el-el.json
+++ b/examples/gr/out/invoice-el-el.json
@@ -4,7 +4,7 @@
 		"uuid": "8a51fd30-2a27-11ee-be56-0242ac120002",
 		"dig": {
 			"alg": "sha256",
-			"val": "0adb783cf39fd01962abbc45755da8a3cf16b16f5a3d0fec3eba7edd68a1bc66"
+			"val": "2946cc07a733a1eaa682226ace3b321077e8f97033642042a67b75c0cf98ffbf"
 		}
 	},
 	"doc": {
@@ -31,7 +31,7 @@
 			"name": "Ελληνικά Τρόφιμα Α.Ε.",
 			"tax_id": {
 				"country": "EL",
-				"code": "728089281"
+				"code": "177472438"
 			},
 			"addresses": [
 				{
@@ -76,7 +76,11 @@
 				"item": {
 					"name": "Υπηρεσίες Ανάπτυξης",
 					"price": "90.00",
-					"unit": "h"
+					"unit": "h",
+					"ext": {
+						"gr-mydata-income-cat": "category1_3",
+						"gr-mydata-income-type": "E3_561_001"
+					}
 				},
 				"sum": "1800.00",
 				"discounts": [
@@ -92,8 +96,6 @@
 						"rate": "standard",
 						"percent": "24%",
 						"ext": {
-							"gr-mydata-income-cat": "category1_1",
-							"gr-mydata-income-type": "E3_106",
 							"gr-mydata-vat-rate": "1"
 						}
 					}
@@ -105,7 +107,11 @@
 				"quantity": "1",
 				"item": {
 					"name": "Tax exempt item",
-					"price": "100.00"
+					"price": "100.00",
+					"ext": {
+						"gr-mydata-income-cat": "category1_3",
+						"gr-mydata-income-type": "E3_561_001"
+					}
 				},
 				"sum": "100.00",
 				"taxes": [
@@ -140,8 +146,6 @@
 							{
 								"key": "standard",
 								"ext": {
-									"gr-mydata-income-cat": "category1_1",
-									"gr-mydata-income-type": "E3_106",
 									"gr-mydata-vat-rate": "1"
 								},
 								"base": "1620.00",
diff --git a/examples/gr/out/invoice-islands.json b/examples/gr/out/invoice-islands.json
index 11a3dcb0..90151050 100644
--- a/examples/gr/out/invoice-islands.json
+++ b/examples/gr/out/invoice-islands.json
@@ -4,7 +4,7 @@
 		"uuid": "8a51fd30-2a27-11ee-be56-0242ac120002",
 		"dig": {
 			"alg": "sha256",
-			"val": "dda9cc633ac5050877271cc1bd6631bd95b1190a4e4b26a69725d86e4f2a6d55"
+			"val": "24b8131e19c332262a8d8afe0bddfaadc7213f841d377fdcfeca8526641cddba"
 		}
 	},
 	"doc": {
@@ -31,7 +31,7 @@
 			"name": "Ελληνικά Τρόφιμα Α.Ε.",
 			"tax_id": {
 				"country": "EL",
-				"code": "728089281"
+				"code": "177472438"
 			},
 			"addresses": [
 				{
diff --git a/org/party.go b/org/party.go
index 867b7af1..8f89d364 100644
--- a/org/party.go
+++ b/org/party.go
@@ -92,7 +92,9 @@ func (p *Party) Validate() error {
 
 // ValidateWithContext is used to check the party's data meets minimum expectations.
 func (p *Party) ValidateWithContext(ctx context.Context) error {
+	ctx = p.ValidationContext(ctx)
 	return tax.ValidateStructWithContext(ctx, p,
+		validation.Field(&p.Regime),
 		validation.Field(&p.Name),
 		validation.Field(&p.TaxID),
 		validation.Field(&p.Identities),
@@ -109,6 +111,14 @@ func (p *Party) ValidateWithContext(ctx context.Context) error {
 	)
 }
 
+// ValidationContext returns a context with the regime's validation rules.
+func (p *Party) ValidationContext(ctx context.Context) context.Context {
+	if r := p.RegimeDef(); r != nil {
+		ctx = r.WithContext(ctx)
+	}
+	return ctx
+}
+
 // JSONSchemaExtend adds extra details to the schema.
 func (Party) JSONSchemaExtend(js *jsonschema.Schema) {
 	js.Extras = map[string]any{
diff --git a/org/party_test.go b/org/party_test.go
index bffbf250..9c40ee70 100644
--- a/org/party_test.go
+++ b/org/party_test.go
@@ -88,3 +88,36 @@ func TestPartyAddressNill(t *testing.T) {
 	party.Normalize(nil)
 	assert.NoError(t, party.Validate())
 }
+
+func TestPartyValidation(t *testing.T) {
+	t.Run("with regime", func(t *testing.T) {
+		party := org.Party{
+			Regime: tax.WithRegime("DE"),
+			Name:   "Invopop",
+			Identities: []*org.Identity{
+				{
+					Key:  "de-tax-number",
+					Code: "123 456 78901",
+				},
+			},
+		}
+		require.NoError(t, party.Calculate())
+		assert.NoError(t, party.Validate())
+		assert.Equal(t, "DE", party.GetRegime().String())
+	})
+	t.Run("with regime and bad code", func(t *testing.T) {
+		party := org.Party{
+			Regime: tax.WithRegime("DE"),
+			Name:   "Invopop",
+			Identities: []*org.Identity{
+				{
+					Key:  "de-tax-number",
+					Code: "1231312423432422",
+				},
+			},
+		}
+		require.NoError(t, party.Calculate())
+		err := party.Validate()
+		assert.ErrorContains(t, err, "identities: (0: (code: must be in a valid format.).).")
+	})
+}
diff --git a/version.go b/version.go
index 2c5b1f5a..73cbda61 100644
--- a/version.go
+++ b/version.go
@@ -8,7 +8,7 @@ import (
 type Version string
 
 // VERSION is the current version of the GOBL library.
-const VERSION Version = "v0.206.0"
+const VERSION Version = "v0.206.1"
 
 // Semver parses and returns semver
 func (v Version) Semver() *semver.Version {