diff --git a/docs/adr/assets/ADR-003/examples/python/requirements.txt b/docs/adr/assets/ADR-003/examples/python/requirements.txt
index b7e317b..2217ba5 100644
--- a/docs/adr/assets/ADR-003/examples/python/requirements.txt
+++ b/docs/adr/assets/ADR-003/examples/python/requirements.txt
@@ -1,2 +1,2 @@
-PyJWT==2.8.0
+PyJWT==2.12.0
 requests==2.32.4
diff --git a/infrastructure/terraform/components/events/cloudwatch_event_rule_supplier_api_to_digital_letters.tf b/infrastructure/terraform/components/events/cloudwatch_event_rule_supplier_api_to_digital_letters.tf
new file mode 100644
index 0000000..5570a18
--- /dev/null
+++ b/infrastructure/terraform/components/events/cloudwatch_event_rule_supplier_api_to_digital_letters.tf
@@ -0,0 +1,64 @@
+resource "aws_cloudwatch_event_rule" "supplier_api_to_digital_letters" {
+  name           = "${local.csi}-supplier-api-to-digital-letters"
+  description    = "Supplier API events routed to Digital Letters"
+  event_bus_name = aws_cloudwatch_event_bus.data_plane.name
+
+  event_pattern = jsonencode({
+    "detail" : {
+      "type" : [
+        { prefix = "uk.nhs.notify.supplier-api.letter.ACCEPTED" },
+        { prefix = "uk.nhs.notify.supplier-api.letter.CANCELLED" },
+        { prefix = "uk.nhs.notify.supplier-api.letter.DELIVERED" },
+        { prefix = "uk.nhs.notify.supplier-api.letter.DISPATCHED" },
+        { prefix = "uk.nhs.notify.supplier-api.letter.ENCLOSED" },
+        { prefix = "uk.nhs.notify.supplier-api.letter.FAILED" },
+        { prefix = "uk.nhs.notify.supplier-api.letter.FORWARDED" },
+        { prefix = "uk.nhs.notify.supplier-api.letter.PENDING" },
+        { prefix = "uk.nhs.notify.supplier-api.letter.PRINTED" },
+        { prefix = "uk.nhs.notify.supplier-api.letter.REJECTED" },
+        { prefix = "uk.nhs.notify.supplier-api.letter.RETURNED" }
+      ]
+    }
+  })
+}
+
+resource "aws_cloudwatch_event_target" "supplier_api_to_digital_letters" {
+  count = var.event_target_arns["digital_letters_eventbus"] != null ? 1 : 0
+
+  rule           = aws_cloudwatch_event_rule.supplier_api_to_digital_letters.name
+  arn            = var.event_target_arns["digital_letters_eventbus"]
+  target_id      = "supplier-api-to-digital-letters-eventbus"
+  event_bus_name = aws_cloudwatch_event_bus.data_plane.name
+  role_arn       = aws_iam_role.supplier_api_to_digital_letters[0].arn
+}
+
+resource "aws_iam_role" "supplier_api_to_digital_letters" {
+  count = var.event_target_arns["digital_letters_eventbus"] != null ? 1 : 0
+
+  name = "eventbridge-cross-account"
+
+  assume_role_policy = jsonencode({
+    Version = "2012-10-17"
+    Statement = [{
+      Effect = "Allow"
+      Principal = {
+        Service = "events.amazonaws.com"
+      }
+      Action = "sts:AssumeRole"
+    }]
+  })
+}
+
+resource "aws_iam_role_policy" "supplier_api_to_digital_letters" {
+  count = var.event_target_arns["digital_letters_eventbus"] != null ? 1 : 0
+
+  role = aws_iam_role.supplier_api_to_digital_letters[0].id
+
+  policy = jsonencode({
+    Statement = [{
+      Effect   = "Allow"
+      Action   = "events:PutEvents"
+      Resource = var.event_target_arns["digital_letters_eventbus"]
+    }]
+  })
+}
diff --git a/infrastructure/terraform/components/events/variables.tf b/infrastructure/terraform/components/events/variables.tf
index 99863c7..7237682 100644
--- a/infrastructure/terraform/components/events/variables.tf
+++ b/infrastructure/terraform/components/events/variables.tf
@@ -90,11 +90,12 @@ variable "event_publisher_account_ids" {
 variable "event_target_arns" {
   description = "A map of event target ARNs keyed by name"
   type = object({
-    sms_nudge              = string
-    notify_core_sns_topic  = optional(string, null)
-    supplier_api_sns_topic = optional(string, null)
-    app_response           = optional(string, null)
-    client_callbacks       = optional(string, null)
+    sms_nudge                = string
+    notify_core_sns_topic    = optional(string, null)
+    supplier_api_sns_topic   = optional(string, null)
+    app_response             = optional(string, null)
+    client_callbacks         = optional(string, null)
+    digital_letters_eventbus = optional(string, null)
   })
 }