diff --git a/src/services/InterviewProcessorService.js b/src/services/InterviewProcessorService.js
index b7d2e2e..3af01a8 100644
--- a/src/services/InterviewProcessorService.js
+++ b/src/services/InterviewProcessorService.js
@@ -56,6 +56,7 @@ processRequestInterview.schema = {
     originator: Joi.string().required(),
     timestamp: Joi.date().required(),
     'mime-type': Joi.string().required(),
+    key: Joi.string().allow(null),
     payload: Joi.object().keys({
       id: Joi.string().uuid().required(),
       xaiId: Joi.string().allow(null),
@@ -176,6 +177,7 @@ processBulkUpdateInterviews.schema = {
     originator: Joi.string().required(),
     timestamp: Joi.date().required(),
     'mime-type': Joi.string().required(),
+    key: Joi.string().allow(null),
     payload: Joi.object().pattern(
       Joi.string().uuid(), // key - jobCandidateId
       Joi.object().pattern(
diff --git a/src/services/JobCandidateProcessorService.js b/src/services/JobCandidateProcessorService.js
index bde7e88..87e66bf 100644
--- a/src/services/JobCandidateProcessorService.js
+++ b/src/services/JobCandidateProcessorService.js
@@ -91,6 +91,7 @@ processCreate.schema = {
     originator: Joi.string().required(),
     timestamp: Joi.date().required(),
     'mime-type': Joi.string().required(),
+    key: Joi.string().allow(null),
     payload: Joi.object().keys({
       id: Joi.string().uuid().required(),
       jobId: Joi.string().uuid().required(),
@@ -160,6 +161,7 @@ processDelete.schema = {
     originator: Joi.string().required(),
     timestamp: Joi.date().required(),
     'mime-type': Joi.string().required(),
+    key: Joi.string().allow(null),
     payload: Joi.object().keys({
       id: Joi.string().uuid().required()
     }).required()
diff --git a/src/services/JobProcessorService.js b/src/services/JobProcessorService.js
index 08f5525..1fdb954 100644
--- a/src/services/JobProcessorService.js
+++ b/src/services/JobProcessorService.js
@@ -65,6 +65,7 @@ processCreate.schema = {
     originator: Joi.string().required(),
     timestamp: Joi.date().required(),
     'mime-type': Joi.string().required(),
+    key: Joi.string().allow(null),
     payload: Joi.object().keys({
       id: Joi.string().uuid().required(),
       projectId: Joi.number().integer().required(),
@@ -142,6 +143,7 @@ processDelete.schema = {
     originator: Joi.string().required(),
     timestamp: Joi.date().required(),
     'mime-type': Joi.string().required(),
+    key: Joi.string().allow(null),
     payload: Joi.object().keys({
       id: Joi.string().uuid().required()
     }).required()
diff --git a/src/services/ResourceBookingProcessorService.js b/src/services/ResourceBookingProcessorService.js
index f407b2b..836e3e1 100644
--- a/src/services/ResourceBookingProcessorService.js
+++ b/src/services/ResourceBookingProcessorService.js
@@ -32,6 +32,7 @@ processCreate.schema = {
     originator: Joi.string().required(),
     timestamp: Joi.date().required(),
     'mime-type': Joi.string().required(),
+    key: Joi.string().allow(null),
     payload: Joi.object().keys({
       id: Joi.string().uuid().required(),
       projectId: Joi.number().integer().required(),
@@ -94,6 +95,7 @@ processDelete.schema = {
     originator: Joi.string().required(),
     timestamp: Joi.date().required(),
     'mime-type': Joi.string().required(),
+    key: Joi.string().allow(null),
     payload: Joi.object().keys({
       id: Joi.string().uuid().required()
     }).required()
diff --git a/src/services/RoleProcessorService.js b/src/services/RoleProcessorService.js
index cf1386f..b183577 100644
--- a/src/services/RoleProcessorService.js
+++ b/src/services/RoleProcessorService.js
@@ -32,6 +32,7 @@ processCreate.schema = {
     originator: Joi.string().required(),
     timestamp: Joi.date().required(),
     'mime-type': Joi.string().required(),
+    key: Joi.string().allow(null),
     payload: Joi.object().keys({
       id: Joi.string().uuid().required(),
       name: Joi.string().max(50).required(),
@@ -103,6 +104,7 @@ processDelete.schema = {
     originator: Joi.string().required(),
     timestamp: Joi.date().required(),
     'mime-type': Joi.string().required(),
+    key: Joi.string().allow(null),
     payload: Joi.object().keys({
       id: Joi.string().uuid().required()
     }).required()
diff --git a/src/services/WorkPeriodPaymentProcessorService.js b/src/services/WorkPeriodPaymentProcessorService.js
index 736cacb..e1bc583 100644
--- a/src/services/WorkPeriodPaymentProcessorService.js
+++ b/src/services/WorkPeriodPaymentProcessorService.js
@@ -62,6 +62,7 @@ processCreate.schema = {
     originator: Joi.string().required(),
     timestamp: Joi.date().required(),
     'mime-type': Joi.string().required(),
+    key: Joi.string().allow(null),
     payload: Joi.object().keys({
       id: Joi.string().uuid().required(),
       workPeriodId: Joi.string().uuid().required(),
diff --git a/src/services/WorkPeriodProcessorService.js b/src/services/WorkPeriodProcessorService.js
index 8350056..eaff8a9 100644
--- a/src/services/WorkPeriodProcessorService.js
+++ b/src/services/WorkPeriodProcessorService.js
@@ -201,6 +201,7 @@ processDelete.schema = {
     originator: Joi.string().required(),
     timestamp: Joi.date().required(),
     'mime-type': Joi.string().required(),
+    key: Joi.string().allow(null),
     payload: Joi.object().keys({
       id: Joi.string().uuid().required()
     }).required()