diff --git a/src/main/kotlin/component/article/routes/UpsertArticle.kt b/src/main/kotlin/component/article/routes/UpsertArticle.kt
index b76f7e0..2020cea 100644
--- a/src/main/kotlin/component/article/routes/UpsertArticle.kt
+++ b/src/main/kotlin/component/article/routes/UpsertArticle.kt
@@ -11,6 +11,7 @@ import fr.dcproject.component.notification.ArticleUpdateNotification
 import fr.dcproject.component.notification.Publisher
 import fr.dcproject.component.workgroup.WorkgroupRef
 import fr.dcproject.security.assert
+import fr.dcproject.utils.receiveOrBadRequest
 import io.ktor.application.ApplicationCall
 import io.ktor.application.call
 import io.ktor.locations.KtorExperimentalLocationsAPI
@@ -39,7 +40,7 @@ object UpsertArticle {
     }
 
     fun Route.upsertArticle(repo: ArticleRepository, publisher: Publisher, ac: ArticleAccessControl) {
-        suspend fun ApplicationCall.convertRequestToEntity(): ArticleForUpdate = receive<Input>().run {
+        suspend fun ApplicationCall.convertRequestToEntity(): ArticleForUpdate = receiveOrBadRequest<Input>().run {
             ArticleForUpdate(
                 id = id ?: UUID.randomUUID(),
                 title = title,
diff --git a/src/main/kotlin/component/auth/routes/Login.kt b/src/main/kotlin/component/auth/routes/Login.kt
index e117dab..57ed358 100644
--- a/src/main/kotlin/component/auth/routes/Login.kt
+++ b/src/main/kotlin/component/auth/routes/Login.kt
@@ -3,6 +3,7 @@ package fr.dcproject.component.auth.routes
 import com.fasterxml.jackson.databind.exc.MismatchedInputException
 import fr.dcproject.component.auth.UserRepository
 import fr.dcproject.component.auth.jwt.makeToken
+import fr.dcproject.utils.receiveOrBadRequest
 import io.ktor.application.call
 import io.ktor.auth.UserPasswordCredential
 import io.ktor.http.HttpStatusCode
@@ -22,7 +23,7 @@ object Login {
     fun Route.authLogin(userRepo: UserRepository) {
         post<LoginRequest> {
             try {
-                val credentials = call.receive<UserPasswordCredential>()
+                val credentials = call.receiveOrBadRequest<UserPasswordCredential>()
                 userRepo.findByCredentials(credentials)?.let { user ->
                     call.respondText(user.makeToken())
                 } ?: call.respond(HttpStatusCode.BadRequest, "Username not exist or password is wrong")
diff --git a/src/main/kotlin/component/auth/routes/Register.kt b/src/main/kotlin/component/auth/routes/Register.kt
index d0f4c3e..3699591 100644
--- a/src/main/kotlin/component/auth/routes/Register.kt
+++ b/src/main/kotlin/component/auth/routes/Register.kt
@@ -8,6 +8,7 @@ import fr.dcproject.component.auth.routes.Register.RegisterRequest.Input
 import fr.dcproject.component.citizen.Citizen
 import fr.dcproject.component.citizen.CitizenI
 import fr.dcproject.component.citizen.CitizenRepository
+import fr.dcproject.utils.receiveOrBadRequest
 import io.ktor.application.call
 import io.ktor.features.BadRequestException
 import io.ktor.http.HttpStatusCode
@@ -60,7 +61,7 @@ object Register {
 
         post<RegisterRequest> {
             try {
-                val citizen = call.receive<Input>().toCitizen()
+                val citizen = call.receiveOrBadRequest<Input>().toCitizen()
                 val createdCitizen = citizenRepo.insertWithUser(citizen)?.user ?: throw BadRequestException("Bad request")
                 call.respondText(createdCitizen.makeToken())
             } catch (e: MissingKotlinParameterException) {
diff --git a/src/main/kotlin/component/auth/routes/Sso.kt b/src/main/kotlin/component/auth/routes/Sso.kt
index 05be7b0..6ac2d86 100644
--- a/src/main/kotlin/component/auth/routes/Sso.kt
+++ b/src/main/kotlin/component/auth/routes/Sso.kt
@@ -2,6 +2,7 @@ package fr.dcproject.component.auth.routes
 
 import fr.dcproject.component.auth.PasswordlessAuth
 import fr.dcproject.component.auth.routes.Sso.PasswordlessRequest.Input
+import fr.dcproject.utils.receiveOrBadRequest
 import io.ktor.application.call
 import io.ktor.http.HttpStatusCode
 import io.ktor.locations.KtorExperimentalLocationsAPI
@@ -23,7 +24,7 @@ object Sso {
      */
     fun Route.authPasswordless(passwordlessAuth: PasswordlessAuth) {
         post<PasswordlessRequest> {
-            call.receive<Input>().run {
+            call.receiveOrBadRequest<Input>().run {
                 try {
                     passwordlessAuth.sendEmail(email, url)
                 } catch (e: PasswordlessAuth.EmailNotFound) {
diff --git a/src/main/kotlin/component/comment/article/routes/CreateCommentArticle.kt b/src/main/kotlin/component/comment/article/routes/CreateCommentArticle.kt
index c708d16..5eff6d4 100644
--- a/src/main/kotlin/component/comment/article/routes/CreateCommentArticle.kt
+++ b/src/main/kotlin/component/comment/article/routes/CreateCommentArticle.kt
@@ -8,6 +8,7 @@ import fr.dcproject.component.comment.article.routes.CreateCommentArticle.PostAr
 import fr.dcproject.component.comment.generic.CommentAccessControl
 import fr.dcproject.component.comment.generic.CommentForUpdate
 import fr.dcproject.security.assert
+import fr.dcproject.utils.receiveOrBadRequest
 import io.ktor.application.ApplicationCall
 import io.ktor.application.call
 import io.ktor.http.HttpStatusCode
@@ -27,7 +28,7 @@ object CreateCommentArticle {
         class Input(val content: String)
     }
 
-    suspend fun PostArticleCommentRequest.getComment(call: ApplicationCall) = call.receive<Input>().run {
+    suspend fun PostArticleCommentRequest.getComment(call: ApplicationCall) = call.receiveOrBadRequest<Input>().run {
         CommentForUpdate(
             target = article,
             createdBy = call.citizen,
diff --git a/src/main/kotlin/component/comment/generic/routes/CreateCommentChildren.kt b/src/main/kotlin/component/comment/generic/routes/CreateCommentChildren.kt
index 33f9fe5..6a1e1ee 100644
--- a/src/main/kotlin/component/comment/generic/routes/CreateCommentChildren.kt
+++ b/src/main/kotlin/component/comment/generic/routes/CreateCommentChildren.kt
@@ -7,6 +7,7 @@ import fr.dcproject.component.comment.generic.CommentForUpdate
 import fr.dcproject.component.comment.generic.CommentRef
 import fr.dcproject.component.comment.generic.CommentRepository
 import fr.dcproject.security.assert
+import fr.dcproject.utils.receiveOrBadRequest
 import io.ktor.application.call
 import io.ktor.features.NotFoundException
 import io.ktor.http.HttpStatusCode
@@ -30,7 +31,7 @@ object CreateCommentChildren {
         post<CreateCommentChildrenRequest> {
             val parent = repo.findById(it.comment.id) ?: throw NotFoundException("Comment not found")
             val newComment = CommentForUpdate(
-                content = call.receive<CreateCommentChildrenRequest.Input>().content,
+                content = call.receiveOrBadRequest<CreateCommentChildrenRequest.Input>().content,
                 createdBy = citizen,
                 parent = parent
             )
diff --git a/src/main/kotlin/component/constitution/routes/CreateConstitution.kt b/src/main/kotlin/component/constitution/routes/CreateConstitution.kt
index 0af8436..c1d8652 100644
--- a/src/main/kotlin/component/constitution/routes/CreateConstitution.kt
+++ b/src/main/kotlin/component/constitution/routes/CreateConstitution.kt
@@ -12,6 +12,7 @@ import fr.dcproject.component.constitution.ConstitutionSimple.TitleSimple
 import fr.dcproject.component.constitution.routes.CreateConstitution.PostConstitutionRequest.Input
 import fr.dcproject.component.constitution.routes.CreateConstitution.PostConstitutionRequest.Input.Title
 import fr.dcproject.security.assert
+import fr.dcproject.utils.receiveOrBadRequest
 import fr.postgresjson.entity.UuidEntity
 import io.ktor.application.call
 import io.ktor.locations.KtorExperimentalLocationsAPI
@@ -72,7 +73,7 @@ object CreateConstitution {
 
     fun Route.createConstitution(repo: ConstitutionRepository, ac: ConstitutionAccessControl) {
         post<PostConstitutionRequest> {
-            getNewConstitution(call.receive(), citizen).let {
+            getNewConstitution(call.receiveOrBadRequest(), citizen).let {
                 ac.assert { canCreate(it, citizenOrNull) }
                 repo.upsert(it)
                 call.respond(it)
diff --git a/src/main/kotlin/component/opinion/routes/OpinionArticle.kt b/src/main/kotlin/component/opinion/routes/OpinionArticle.kt
index ced5ebb..ab2a37d 100644
--- a/src/main/kotlin/component/opinion/routes/OpinionArticle.kt
+++ b/src/main/kotlin/component/opinion/routes/OpinionArticle.kt
@@ -7,6 +7,7 @@ import fr.dcproject.component.opinion.OpinionAccessControl
 import fr.dcproject.component.opinion.entity.OpinionChoiceRef
 import fr.dcproject.component.opinion.entity.OpinionForUpdate
 import fr.dcproject.security.assert
+import fr.dcproject.utils.receiveOrBadRequest
 import fr.dcproject.utils.toUUID
 import io.ktor.application.call
 import io.ktor.http.HttpStatusCode
@@ -34,7 +35,7 @@ object OpinionArticle {
 
     fun Route.setOpinionOnArticle(repo: OpinionArticleRepository, ac: OpinionAccessControl) {
         put<ArticleOpinion> {
-            call.receive<ArticleOpinion.Body>().ids.map { id ->
+            call.receiveOrBadRequest<ArticleOpinion.Body>().ids.map { id ->
                 OpinionForUpdate(
                     choice = OpinionChoiceRef(id),
                     target = it.article,
diff --git a/src/main/kotlin/component/vote/routes/PutVoteOnArticle.kt b/src/main/kotlin/component/vote/routes/PutVoteOnArticle.kt
index 5a8501b..3c2adbe 100644
--- a/src/main/kotlin/component/vote/routes/PutVoteOnArticle.kt
+++ b/src/main/kotlin/component/vote/routes/PutVoteOnArticle.kt
@@ -8,6 +8,7 @@ import fr.dcproject.component.vote.VoteAccessControl
 import fr.dcproject.component.vote.VoteArticleRepository
 import fr.dcproject.component.vote.entity.VoteForUpdate
 import fr.dcproject.security.assert
+import fr.dcproject.utils.receiveOrBadRequest
 import io.ktor.application.call
 import io.ktor.features.NotFoundException
 import io.ktor.http.HttpStatusCode
@@ -29,7 +30,7 @@ object PutVoteOnArticle {
 
     fun Route.putVoteOnArticle(repo: VoteArticleRepository, ac: VoteAccessControl, articleRepo: ArticleRepository) {
         put<ArticleVoteRequest> {
-            val input = call.receive<ArticleVoteRequest.Input>()
+            val input = call.receiveOrBadRequest<ArticleVoteRequest.Input>()
             val article = articleRepo.findById(it.article.id) ?: throw NotFoundException("Article ${it.article.id} not found")
             val vote = VoteForUpdate(
                 target = article,
diff --git a/src/main/kotlin/component/vote/routes/PutVoteOnComment.kt b/src/main/kotlin/component/vote/routes/PutVoteOnComment.kt
index 9a38d0e..745032c 100644
--- a/src/main/kotlin/component/vote/routes/PutVoteOnComment.kt
+++ b/src/main/kotlin/component/vote/routes/PutVoteOnComment.kt
@@ -7,6 +7,7 @@ import fr.dcproject.component.vote.VoteAccessControl
 import fr.dcproject.component.vote.VoteCommentRepository
 import fr.dcproject.component.vote.entity.VoteForUpdate
 import fr.dcproject.security.assert
+import fr.dcproject.utils.receiveOrBadRequest
 import io.ktor.application.call
 import io.ktor.http.HttpStatusCode
 import io.ktor.locations.KtorExperimentalLocationsAPI
@@ -27,7 +28,7 @@ object PutVoteOnComment {
     fun Route.putVoteOnComment(voteCommentRepo: VoteCommentRepository, commentRepo: CommentRepository, ac: VoteAccessControl) {
         put<CommentVoteRequest> {
             val comment = commentRepo.findById(it.comment)!!
-            val content = call.receive<CommentVoteRequest.Content>()
+            val content = call.receiveOrBadRequest<CommentVoteRequest.Content>()
             val vote = VoteForUpdate(
                 target = comment,
                 note = content.note,
diff --git a/src/main/kotlin/component/vote/routes/VoteConstitution.kt b/src/main/kotlin/component/vote/routes/VoteConstitution.kt
index a777010..6a7dd0d 100644
--- a/src/main/kotlin/component/vote/routes/VoteConstitution.kt
+++ b/src/main/kotlin/component/vote/routes/VoteConstitution.kt
@@ -9,6 +9,7 @@ import fr.dcproject.component.vote.VoteConstitutionRepository
 import fr.dcproject.component.vote.entity.VoteForUpdate
 import fr.dcproject.component.vote.routes.VoteConstitution.ConstitutionVoteRequest.Input
 import fr.dcproject.security.assert
+import fr.dcproject.utils.receiveOrBadRequest
 import io.ktor.application.call
 import io.ktor.features.NotFoundException
 import io.ktor.http.HttpStatusCode
@@ -32,7 +33,7 @@ object VoteConstitution {
     fun Route.voteConstitution(repo: VoteConstitutionRepository, ac: VoteAccessControl, constitutionRepo: ConstitutionRepository) {
         put<ConstitutionVoteRequest> {
             val constitution = constitutionRepo.findById(it.constitution.id) ?: throw NotFoundException("Unable to find constitution ${it.constitution.id}")
-            val content = call.receive<Input>()
+            val content = call.receiveOrBadRequest<Input>()
             val vote = VoteForUpdate(
                 target = constitution,
                 note = content.note,
diff --git a/src/main/kotlin/component/workgroup/routes/CreateWorkgroup.kt b/src/main/kotlin/component/workgroup/routes/CreateWorkgroup.kt
index 7013258..fe02e0d 100644
--- a/src/main/kotlin/component/workgroup/routes/CreateWorkgroup.kt
+++ b/src/main/kotlin/component/workgroup/routes/CreateWorkgroup.kt
@@ -7,6 +7,7 @@ import fr.dcproject.component.workgroup.WorkgroupRepository
 import fr.dcproject.component.workgroup.WorkgroupSimple
 import fr.dcproject.component.workgroup.routes.CreateWorkgroup.PostWorkgroupRequest.Input
 import fr.dcproject.security.assert
+import fr.dcproject.utils.receiveOrBadRequest
 import io.ktor.application.call
 import io.ktor.http.HttpStatusCode
 import io.ktor.locations.KtorExperimentalLocationsAPI
@@ -32,7 +33,7 @@ object CreateWorkgroup {
 
     fun Route.createWorkgroup(repo: WorkgroupRepository, ac: WorkgroupAccessControl) {
         post<PostWorkgroupRequest> {
-            call.receive<Input>().run {
+            call.receiveOrBadRequest<Input>().run {
                 WorkgroupSimple(
                     id ?: UUID.randomUUID(),
                     name,
diff --git a/src/main/kotlin/component/workgroup/routes/EditWorkgroup.kt b/src/main/kotlin/component/workgroup/routes/EditWorkgroup.kt
index 9652c0d..04325d9 100644
--- a/src/main/kotlin/component/workgroup/routes/EditWorkgroup.kt
+++ b/src/main/kotlin/component/workgroup/routes/EditWorkgroup.kt
@@ -5,6 +5,7 @@ import fr.dcproject.component.workgroup.WorkgroupAccessControl
 import fr.dcproject.component.workgroup.WorkgroupRepository
 import fr.dcproject.component.workgroup.routes.EditWorkgroup.PutWorkgroupRequest.Input
 import fr.dcproject.security.assert
+import fr.dcproject.utils.receiveOrBadRequest
 import io.ktor.application.call
 import io.ktor.http.HttpStatusCode
 import io.ktor.locations.KtorExperimentalLocationsAPI
@@ -31,7 +32,7 @@ object EditWorkgroup {
     fun Route.editWorkgroup(repo: WorkgroupRepository, ac: WorkgroupAccessControl) {
         put<PutWorkgroupRequest> {
             repo.findById(it.workgroupId)?.let { old ->
-                call.receive<Input>().run {
+                call.receiveOrBadRequest<Input>().run {
                     old.copy(
                         name = name ?: old.name,
                         description = description ?: old.description,
diff --git a/src/main/kotlin/component/workgroup/routes/members/AddMemberToWorkgroup.kt b/src/main/kotlin/component/workgroup/routes/members/AddMemberToWorkgroup.kt
index 8f10bac..a6ee8b5 100644
--- a/src/main/kotlin/component/workgroup/routes/members/AddMemberToWorkgroup.kt
+++ b/src/main/kotlin/component/workgroup/routes/members/AddMemberToWorkgroup.kt
@@ -6,6 +6,7 @@ import fr.dcproject.component.workgroup.WorkgroupAccessControl
 import fr.dcproject.component.workgroup.WorkgroupRepository
 import fr.dcproject.component.workgroup.WorkgroupWithMembersI
 import fr.dcproject.security.assert
+import fr.dcproject.utils.receiveOrBadRequest
 import io.ktor.application.ApplicationCall
 import io.ktor.application.call
 import io.ktor.http.HttpStatusCode
@@ -32,7 +33,7 @@ object AddMemberToWorkgroup {
     }
 
     @KtorExperimentalLocationsAPI
-    private suspend fun ApplicationCall.getMembersFromRequest(): List<WorkgroupWithMembersI.Member<CitizenRef>> = receive<WorkgroupsMembersRequest.Input>().map {
+    private suspend fun ApplicationCall.getMembersFromRequest(): List<WorkgroupWithMembersI.Member<CitizenRef>> = receiveOrBadRequest<WorkgroupsMembersRequest.Input>().map {
         WorkgroupWithMembersI.Member(
             citizen = it.citizen,
             roles = it.roles
diff --git a/src/main/kotlin/component/workgroup/routes/members/DeleteMembersOfWorkgroup.kt b/src/main/kotlin/component/workgroup/routes/members/DeleteMembersOfWorkgroup.kt
index cbc3268..49ed4d2 100644
--- a/src/main/kotlin/component/workgroup/routes/members/DeleteMembersOfWorkgroup.kt
+++ b/src/main/kotlin/component/workgroup/routes/members/DeleteMembersOfWorkgroup.kt
@@ -6,6 +6,7 @@ import fr.dcproject.component.workgroup.WorkgroupAccessControl
 import fr.dcproject.component.workgroup.WorkgroupRepository
 import fr.dcproject.component.workgroup.WorkgroupWithMembersI
 import fr.dcproject.security.assert
+import fr.dcproject.utils.receiveOrBadRequest
 import io.ktor.application.ApplicationCall
 import io.ktor.application.call
 import io.ktor.http.HttpStatusCode
@@ -31,7 +32,7 @@ object DeleteMembersOfWorkgroup {
         }
     }
 
-    private suspend fun ApplicationCall.getMembersFromRequest(): List<WorkgroupWithMembersI.Member<CitizenRef>> = receive<WorkgroupsMembersRequest.Input>().map {
+    private suspend fun ApplicationCall.getMembersFromRequest(): List<WorkgroupWithMembersI.Member<CitizenRef>> = receiveOrBadRequest<WorkgroupsMembersRequest.Input>().map {
         WorkgroupWithMembersI.Member(
             citizen = it.citizen,
             roles = it.roles
diff --git a/src/main/kotlin/component/workgroup/routes/members/UpdateMemberOfWorkgroup.kt b/src/main/kotlin/component/workgroup/routes/members/UpdateMemberOfWorkgroup.kt
index d35d2ba..c177714 100644
--- a/src/main/kotlin/component/workgroup/routes/members/UpdateMemberOfWorkgroup.kt
+++ b/src/main/kotlin/component/workgroup/routes/members/UpdateMemberOfWorkgroup.kt
@@ -6,6 +6,7 @@ import fr.dcproject.component.workgroup.WorkgroupAccessControl
 import fr.dcproject.component.workgroup.WorkgroupRepository
 import fr.dcproject.component.workgroup.WorkgroupWithMembersI
 import fr.dcproject.security.assert
+import fr.dcproject.utils.receiveOrBadRequest
 import io.ktor.application.ApplicationCall
 import io.ktor.application.call
 import io.ktor.http.HttpStatusCode
@@ -31,7 +32,7 @@ object UpdateMemberOfWorkgroup {
         }
     }
 
-    private suspend fun ApplicationCall.getMembersFromRequest(): List<WorkgroupWithMembersI.Member<CitizenRef>> = receive<WorkgroupsMembersRequest.Input>().map {
+    private suspend fun ApplicationCall.getMembersFromRequest(): List<WorkgroupWithMembersI.Member<CitizenRef>> = receiveOrBadRequest<WorkgroupsMembersRequest.Input>().map {
         WorkgroupWithMembersI.Member(
             citizen = it.citizen,
             roles = it.roles