diff --git a/sda/internal/schema/schema_test.go b/sda/internal/schema/schema_test.go
index f09830add..bb36014f7 100644
--- a/sda/internal/schema/schema_test.go
+++ b/sda/internal/schema/schema_test.go
@@ -76,10 +76,11 @@ func TestValidateJSONDatasetRelease(t *testing.T) {
 
 	msg, _ := json.Marshal(okMsg)
 	assert.Nil(t, ValidateJSON(fmt.Sprintf("%s/federated/dataset-release.json", schemaPath), msg))
+	assert.Nil(t, ValidateJSON(fmt.Sprintf("%s/isolated/dataset-release.json", schemaPath), msg))
 
 	badMsg := DatasetMapping{
 		Type:      "release",
-		DatasetID: "ABCD00123456789",
+		DatasetID: "",
 		AccessionIDs: []string{
 			"c177c69c-dcc6-4174-8740-919b8f994122",
 		},
@@ -87,6 +88,7 @@ func TestValidateJSONDatasetRelease(t *testing.T) {
 
 	msg, _ = json.Marshal(badMsg)
 	assert.Error(t, ValidateJSON(fmt.Sprintf("%s/federated/dataset-release.json", schemaPath), msg))
+	assert.Error(t, ValidateJSON(fmt.Sprintf("%s/isolated/dataset-release.json", schemaPath), msg))
 }
 
 func TestValidateJSONInboxRemove(t *testing.T) {
@@ -215,18 +217,21 @@ func TestValidateJSONIngestionAccession(t *testing.T) {
 
 	msg, _ := json.Marshal(okMsg)
 	assert.Nil(t, ValidateJSON(fmt.Sprintf("%s/federated/ingestion-accession.json", schemaPath), msg))
+	assert.Nil(t, ValidateJSON(fmt.Sprintf("%s/isolated/ingestion-accession.json", schemaPath), msg))
 
 	badMsg := IngestionAccession{
 		User:        "JohnDoe",
 		FilePath:    "path/to file",
-		AccessionID: "ABCD00123456789",
+		AccessionID: "",
 		DecryptedChecksums: []Checksums{
 			{Type: "sha256", Value: "da886a89637d125ef9f15f6d676357f3a9e5e10306929f0bad246375af89c2e2"},
+			{Type: "md5", Value: "68b329da9893e34099c7d8ad5cb9c940"},
 		},
 	}
 
 	msg, _ = json.Marshal(badMsg)
 	assert.Error(t, ValidateJSON(fmt.Sprintf("%s/federated/ingestion-accession.json", schemaPath), msg))
+	assert.Error(t, ValidateJSON(fmt.Sprintf("%s/isolated/ingestion-accession.json", schemaPath), msg))
 }
 
 func TestValidateJSONIngestionCompletion(t *testing.T) {
@@ -242,11 +247,12 @@ func TestValidateJSONIngestionCompletion(t *testing.T) {
 
 	msg, _ := json.Marshal(okMsg)
 	assert.Nil(t, ValidateJSON(fmt.Sprintf("%s/federated/ingestion-completion.json", schemaPath), msg))
+	assert.Nil(t, ValidateJSON(fmt.Sprintf("%s/isolated/ingestion-completion.json", schemaPath), msg))
 
 	badMsg := IngestionCompletion{
 		User:        "JohnDoe",
 		FilePath:    "path/to file",
-		AccessionID: "EGAF00123456789",
+		AccessionID: "",
 		DecryptedChecksums: []Checksums{
 			{Type: "md5", Value: "68b329da9893e34099c7d8ad5cb9c940"},
 		},
@@ -254,6 +260,7 @@ func TestValidateJSONIngestionCompletion(t *testing.T) {
 
 	msg, _ = json.Marshal(badMsg)
 	assert.Error(t, ValidateJSON(fmt.Sprintf("%s/federated/ingestion-completion.json", schemaPath), msg))
+	assert.Error(t, ValidateJSON(fmt.Sprintf("%s/isolated/ingestion-completion.json", schemaPath), msg))
 }
 
 func TestValidateJSONIngestionTrigger(t *testing.T) {
@@ -274,6 +281,7 @@ func TestValidateJSONIngestionTrigger(t *testing.T) {
 
 	msg, _ = json.Marshal(badMsg)
 	assert.Error(t, ValidateJSON(fmt.Sprintf("%s/federated/ingestion-trigger.json", schemaPath), msg))
+	assert.Error(t, ValidateJSON(fmt.Sprintf("%s/isolated/ingestion-trigger.json", schemaPath), msg))
 }
 
 func TestValidateJSONIngestionUserError(t *testing.T) {
@@ -374,9 +382,10 @@ func TestValidateJSONIsloatedIngestionAccession(t *testing.T) {
 	badMsg := IngestionAccession{
 		User:        "JohnDoe",
 		FilePath:    "path/to file",
-		AccessionID: "ABCD00123456789",
+		AccessionID: "",
 		DecryptedChecksums: []Checksums{
 			{Type: "sha256", Value: "da886a89637d125ef9f15f6d676357f3a9e5e10306929f0bad246375af89c2e2"},
+			{Type: "md5", Value: "68b329da9893e34099c7d8ad5cb9c940"},
 		},
 	}
 
diff --git a/sda/schemas/isolated/dataset-deprecate.json b/sda/schemas/isolated/dataset-deprecate.json
index 0e09965a1..d279a8195 100644
--- a/sda/schemas/isolated/dataset-deprecate.json
+++ b/sda/schemas/isolated/dataset-deprecate.json
@@ -21,6 +21,7 @@
             "type": "string",
             "title": "The Accession identifier for the dataset",
             "description": "The Accession identifier for the dataset",
+            "minLength": 2,
             "examples": [
                 "anyidentifier"
             ]
diff --git a/sda/schemas/isolated/dataset-mapping.json b/sda/schemas/isolated/dataset-mapping.json
index 28f736d72..543f61d86 100644
--- a/sda/schemas/isolated/dataset-mapping.json
+++ b/sda/schemas/isolated/dataset-mapping.json
@@ -22,6 +22,7 @@
             "type": "string",
             "title": "The Accession identifier for the dataset",
             "description": "The Accession identifier for the dataset",
+            "minLength": 2,
             "pattern": "^\\S+$",
             "examples": [
                 "anyidentifier"
diff --git a/sda/schemas/isolated/ingestion-accession.json b/sda/schemas/isolated/ingestion-accession.json
index 4b3cdfe16..fddd94622 100644
--- a/sda/schemas/isolated/ingestion-accession.json
+++ b/sda/schemas/isolated/ingestion-accession.json
@@ -116,6 +116,7 @@
             "type": "string",
             "title": "The Accession identifier",
             "description": "The Accession identifier",
+            "minLength": 2,
             "pattern": "^\\S+$",
             "examples": [
                 "anyidentifier"