diff --git a/mod-orders/examples/receivingCollection.sample b/mod-orders/examples/receivingCollection.sample
index c824dbe7..ebdeaa57 100644
--- a/mod-orders/examples/receivingCollection.sample
+++ b/mod-orders/examples/receivingCollection.sample
@@ -5,6 +5,7 @@
       "received": 2,
       "receivedItems": [
         {
+          "accessionNumber": "A123456789",
           "barcode": "0987654321",
           "callNumber": "PR 8923 W6 L36 1990 c.3",
           "comment": "Very important note",
@@ -15,6 +16,7 @@
           "pieceId": "c18c49b7-d970-44d6-b5d4-bd76c1c62d83"
         },
         {
+          "accessionNumber": "A987654321",
           "barcode": "0987654111",
           "callNumber": "BF2050 .M335 1999",
           "comment": "Very important note",
@@ -31,6 +33,7 @@
       "received": 1,
       "receivedItems": [
         {
+          "accessionNumber": "A123456",
           "barcode": "0987654333",
           "callNumber": "PR 8923 W6 L36 1990 c.4",
           "comment": "Very important note",
diff --git a/mod-orders/schemas/receivingCollection.json b/mod-orders/schemas/receivingCollection.json
index 524851bf..49521526 100644
--- a/mod-orders/schemas/receivingCollection.json
+++ b/mod-orders/schemas/receivingCollection.json
@@ -26,6 +26,10 @@
             "items": {
               "type": "object",
               "properties": {
+                "accessionNumber": {
+                  "description": "The accession number assigned to the piece",
+                  "type": "string"
+                },
                 "barcode": {
                   "description": "The barcode assigned to the item",
                   "type": "string"