diff --git a/specification/paths.json b/specification/paths.json
index 2480eff5..5405c22a 100644
--- a/specification/paths.json
+++ b/specification/paths.json
@@ -131,6 +131,9 @@
   "/onboarding/v1/invitations/{invitation_id}/onboard": {
     "$ref": "./paths/Onboarding-v1-invitations-invitation_id-onboard.json"
   },
+  "/orders/v1/orders/{reference}": {
+    "$ref": "./paths/Orders-v1-orders-reference.json"
+  },
   "/organizations": {
     "$ref": "./paths/Organizations.json"
   },
diff --git a/specification/paths/Orders-v1-orders-reference.json b/specification/paths/Orders-v1-orders-reference.json
new file mode 100644
index 00000000..147fb017
--- /dev/null
+++ b/specification/paths/Orders-v1-orders-reference.json
@@ -0,0 +1,80 @@
+{
+  "parameters": [
+    {
+      "name": "reference",
+      "in": "path",
+      "description": "Order reference to retrieve the order by.",
+      "required": true,
+      "schema": {
+        "type": "string"
+      }
+    },
+    {
+      "name": "shop_id",
+      "in": "query",
+      "required": true,
+      "description": "Id of the shop to retrieve the order for.",
+      "schema": {
+        "$ref": "#/components/schemas/Uuid"
+      }
+    },
+    {
+      "name": "email",
+      "in": "query",
+      "description": "Email address of the receiver of the order. This query parameter is mutually exclusive with postal code query parameter. Either one is required.",
+      "schema": {
+        "$ref": "#/components/schemas/Email"
+      }
+    },
+    {
+      "name": "postal_code",
+      "in": "query",
+      "description": "Postal code of the receiver of the order. This query parameter is mutually exclusive with email query parameter. Either one is required.",
+      "schema": {
+        "type": "string",
+        "example": "1111AA"
+      }
+    }
+  ],
+  "get": {
+    "tags": [
+      "Orders"
+    ],
+    "security": [
+      {
+        "OAuth2": [
+          "returns.manage"
+        ]
+      }
+    ],
+    "summary": "Get an order resource by reference and email or postal code.",
+    "description": "This endpoint retrieves an order resource by the specified reference and either email address or postal code.",
+    "responses": {
+      "200": {
+        "description": "Retrieved the order.",
+        "content": {
+          "application/vnd.api+json": {
+            "schema": {
+              "type": "object",
+              "required": [
+                "data"
+              ],
+              "additionalProperties": false,
+              "properties": {
+                "data": {
+                  "$ref": "#/components/schemas/OrderResponse"
+                }
+              }
+            }
+          }
+        }
+      },
+      "404": {
+        "description": "No order was found with the provided input."
+      },
+      "409": {
+        "description": "One or more of the orders resource is handled by a 3rd party."
+      }
+    }
+  }
+}
diff --git a/specification/paths/Returns-v1-return-methods-resolve.json b/specification/paths/Returns-v1-return-methods-resolve.json
index 4d3ad275..531f0e95 100644
--- a/specification/paths/Returns-v1-return-methods-resolve.json
+++ b/specification/paths/Returns-v1-return-methods-resolve.json
@@ -43,19 +43,39 @@
                     "example": "35eddf50-1d84-47a3-8479-6bfda729cd99"
                   },
                   "consumer_address": {
-                    "required": [
-                      "country_code",
-                      "email"
-                    ],
-                    "properties": {
-                      "country_code": {
-                        "$ref": "#/components/schemas/CountryCode"
+                    "oneOf": [
+                      {
+                        "title": "Resolve order by email",
+                        "required": [
+                          "country_code",
+                          "email"
+                        ],
+                        "properties": {
+                          "country_code": {
+                            "$ref": "#/components/schemas/CountryCode"
+                          },
+                          "email": {
+                            "$ref": "#/components/schemas/Email"
+                          }
+                        }
                       },
-                      "email": {
-                        "$ref": "#/components/schemas/Email",
-                        "example": "s.holmes@holmesinvestigations.com"
+                      {
+                        "title": "Resolve order by postal code",
+                        "required": [
+                          "country_code",
+                          "postal_code"
+                        ],
+                        "properties": {
+                          "country_code": {
+                            "$ref": "#/components/schemas/CountryCode"
+                          },
+                          "postal_code": {
+                            "type": "string",
+                            "example": "1111AA"
+                          }
+                        }
                       }
-                    }
+                    ]
                   },
                   "weight": {
                     "type": "integer",
diff --git a/specification/paths/Returns-v1-shops-shop_id-orders-reference-email.json b/specification/paths/Returns-v1-shops-shop_id-orders-reference-email.json
index dbd50655..3371ab99 100644
--- a/specification/paths/Returns-v1-shops-shop_id-orders-reference-email.json
+++ b/specification/paths/Returns-v1-shops-shop_id-orders-reference-email.json
@@ -33,6 +33,7 @@
         ]
       }
     ],
+    "deprecated": true,
     "summary": "Get an order resource.",
     "description": "This endpoint retrieves an order resource by the specified reference and email address.",
     "responses": {
diff --git a/specification/tags.json b/specification/tags.json
index 12ded8c1..f9c26fd6 100644
--- a/specification/tags.json
+++ b/specification/tags.json
@@ -98,6 +98,9 @@
   {
     "name": "Onboarding"
   },
+  {
+    "name": "Orders"
+  },
   {
     "name": "Organizations",
     "externalDocs": {