diff --git a/pollux/lib/core/src/main/scala/io/iohk/atala/pollux/core/model/error/PresentationError.scala b/pollux/lib/core/src/main/scala/io/iohk/atala/pollux/core/model/error/PresentationError.scala
index 7ecf89525c..a7227cee7e 100644
--- a/pollux/lib/core/src/main/scala/io/iohk/atala/pollux/core/model/error/PresentationError.scala
+++ b/pollux/lib/core/src/main/scala/io/iohk/atala/pollux/core/model/error/PresentationError.scala
@@ -17,6 +17,6 @@ object PresentationError {
   object MissingCredential extends PresentationError
   object MissingCredentialFormat extends PresentationError
   final case class UnsupportedCredentialFormat(vcFormat: String) extends PresentationError
-
+  final case class InvalidAnoncredPresentationRequest(error: String) extends PresentationError
   final case class MissingAnoncredPresentationRequest(error: String) extends PresentationError
 }
diff --git a/pollux/lib/core/src/main/scala/io/iohk/atala/pollux/core/service/PresentationServiceImpl.scala b/pollux/lib/core/src/main/scala/io/iohk/atala/pollux/core/service/PresentationServiceImpl.scala
index 12678eb92d..f81699abeb 100644
--- a/pollux/lib/core/src/main/scala/io/iohk/atala/pollux/core/service/PresentationServiceImpl.scala
+++ b/pollux/lib/core/src/main/scala/io/iohk/atala/pollux/core/service/PresentationServiceImpl.scala
@@ -21,7 +21,7 @@ import zio.*
 import java.rmi.UnexpectedException
 import java.time.Instant
 import java.util as ju
-import java.util.UUID
+import java.util.{UUID, Base64 as JBase64}
 
 private class PresentationServiceImpl(
     presentationRepository: PresentationRepository,
@@ -278,9 +278,17 @@ private class PresentationServiceImpl(
           val jsonF = PresentCredentialRequestFormat.JWT.name // stable identifier
           val anoncredF = PresentCredentialRequestFormat.Anoncred.name // stable identifier
           head.format match
-            case None                    => ZIO.fail(PresentationError.MissingCredentialFormat)
-            case Some(`jsonF`)           => ZIO.succeed(CredentialFormat.JWT)
-            case Some(`anoncredF`)       => ZIO.succeed(CredentialFormat.AnonCreds)
+            case None          => ZIO.fail(PresentationError.MissingCredentialFormat)
+            case Some(`jsonF`) => ZIO.succeed(CredentialFormat.JWT)
+            case Some(`anoncredF`) =>
+              head.data match
+                case Base64(data) =>
+                  val decodedData = new String(JBase64.getUrlDecoder.decode(data))
+                  AnoncredPresentationRequestV1.schemaSerDes
+                    .validate(decodedData)
+                    .map(_ => CredentialFormat.AnonCreds)
+                    .mapError(error => InvalidAnoncredPresentationRequest(error.error))
+                case _ => ZIO.fail(InvalidAnoncredPresentationRequest("Expecting Base64-encoded data"))
             case Some(unsupportedFormat) => ZIO.fail(PresentationError.UnsupportedCredentialFormat(unsupportedFormat))
         case _ => ZIO.fail(PresentationError.UnexpectedError("Presentation with multi attachments"))
       }
diff --git a/pollux/lib/core/src/test/scala/io/iohk/atala/pollux/core/service/PresentationServiceSpec.scala b/pollux/lib/core/src/test/scala/io/iohk/atala/pollux/core/service/PresentationServiceSpec.scala
index 96d2f1ea1d..332810668a 100644
--- a/pollux/lib/core/src/test/scala/io/iohk/atala/pollux/core/service/PresentationServiceSpec.scala
+++ b/pollux/lib/core/src/test/scala/io/iohk/atala/pollux/core/service/PresentationServiceSpec.scala
@@ -319,7 +319,7 @@ object PresentationServiceSpec extends ZIOSpecDefault with PresentationServiceSp
           fails(equalTo(UnsupportedCredentialFormat(vcFormat = "Some/UnsupportedCredentialFormat")))
         )
       },
-      test("receiveRequestPresentation updates the RequestPresentation in PresentatinRecord") {
+      test("receiveRequestPresentation JWT updates the RequestPresentation in PresentationRecord") {
         for {
           svc <- ZIO.service[PresentationService]
           connectionId = Some("connectionId")
@@ -350,6 +350,100 @@ object PresentationServiceSpec extends ZIOSpecDefault with PresentationServiceSp
           assertTrue(aRecord.requestPresentationData == Some(requestPresentation))
         }
       },
+      test("receiveRequestPresentation Anoncred updates the RequestPresentation in PresentationRecord") {
+        for {
+          svc <- ZIO.service[PresentationService]
+          connectionId = Some("connectionId")
+          body = RequestPresentation.Body(goal_code = Some("Presentation Request"))
+          prover = DidId("did:peer:Prover")
+          verifier = DidId("did:peer:Verifier")
+          anoncredPresentationRequestV1 = AnoncredPresentationRequestV1(
+            Map.empty,
+            Map.empty,
+            "name",
+            "nonce",
+            "version",
+            None
+          )
+          attachmentDescriptor = AttachmentDescriptor.buildBase64Attachment(
+            mediaType = Some("application/json"),
+            format = Some(PresentCredentialRequestFormat.Anoncred.name),
+            payload = AnoncredPresentationRequestV1.schemaSerDes.serialize(anoncredPresentationRequestV1).getBytes()
+          )
+          requestPresentation = RequestPresentation(
+            body = body,
+            attachments = Seq(attachmentDescriptor),
+            to = prover,
+            from = verifier,
+          )
+          aRecord <- svc.receiveRequestPresentation(connectionId, requestPresentation)
+
+        } yield {
+          assertTrue(aRecord.connectionId == connectionId) &&
+          assertTrue(aRecord.protocolState == PresentationRecord.ProtocolState.RequestReceived) &&
+          assertTrue(aRecord.requestPresentationData == Some(requestPresentation))
+        }
+      },
+      test("receiveRequestPresentation Anoncred should fail given invalid attachment") {
+        for {
+          svc <- ZIO.service[PresentationService]
+          connectionId = Some("connectionId")
+          body = RequestPresentation.Body(goal_code = Some("Presentation Request"))
+          presentationAttachmentAsJson =
+            """{
+                "challenge": "1f44d55f-f161-4938-a659-f8026467f126",
+                "domain": "us.gov/DriverLicense",
+                "credential_manifest": {}
+            }"""
+          prover = DidId("did:peer:Prover")
+          verifier = DidId("did:peer:Verifier")
+
+          attachmentDescriptor = AttachmentDescriptor.buildJsonAttachment(
+            payload = presentationAttachmentAsJson,
+            format = Some(PresentCredentialProposeFormat.Anoncred.name)
+          )
+          requestPresentation = RequestPresentation(
+            body = body,
+            attachments = Seq(attachmentDescriptor),
+            to = prover,
+            from = verifier,
+          )
+          result <- svc.receiveRequestPresentation(connectionId, requestPresentation).exit
+
+        } yield assert(result)(
+          fails(equalTo(InvalidAnoncredPresentationRequest("Expecting Base64-encoded data")))
+        )
+      },
+      test("receiveRequestPresentation Anoncred should fail given invalid anoncred format") {
+        for {
+          svc <- ZIO.service[PresentationService]
+          connectionId = Some("connectionId")
+          body = RequestPresentation.Body(goal_code = Some("Presentation Request"))
+          presentationAttachmentAsJson =
+            """{
+                "challenge": "1f44d55f-f161-4938-a659-f8026467f126",
+                "domain": "us.gov/DriverLicense",
+                "credential_manifest": {}
+            }"""
+          prover = DidId("did:peer:Prover")
+          verifier = DidId("did:peer:Verifier")
+          attachmentDescriptor = AttachmentDescriptor.buildBase64Attachment(
+            mediaType = Some("application/json"),
+            format = Some(PresentCredentialRequestFormat.Anoncred.name),
+            payload = presentationAttachmentAsJson.getBytes()
+          )
+          requestPresentation = RequestPresentation(
+            body = body,
+            attachments = Seq(attachmentDescriptor),
+            to = prover,
+            from = verifier,
+          )
+          result <- svc.receiveRequestPresentation(connectionId, requestPresentation).exit
+
+        } yield assert(result)(
+          fails(isSubtype[InvalidAnoncredPresentationRequest](anything))
+        )
+      },
       test("acceptRequestPresentation updates the PresentatinRecord JWT") {
         for {
           repo <- ZIO.service[CredentialRepository]
diff --git a/prism-agent/service/server/src/main/scala/io/iohk/atala/presentproof/controller/PresentProofController.scala b/prism-agent/service/server/src/main/scala/io/iohk/atala/presentproof/controller/PresentProofController.scala
index 02dc1223d2..6ab89d8016 100644
--- a/prism-agent/service/server/src/main/scala/io/iohk/atala/presentproof/controller/PresentProofController.scala
+++ b/prism-agent/service/server/src/main/scala/io/iohk/atala/presentproof/controller/PresentProofController.scala
@@ -47,6 +47,8 @@ object PresentProofController {
         ErrorResponse.badRequest(title = "InvalidFlowState", detail = Some(msg))
       case PresentationError.MissingAnoncredPresentationRequest(msg) =>
         ErrorResponse.badRequest(title = "Missing Anoncred Presentation Request", detail = Some(msg))
+      case PresentationError.InvalidAnoncredPresentationRequest(msg) =>
+        ErrorResponse.badRequest(title = "Invalid Anoncred Presentation Request", detail = Some(msg))
       case PresentationError.UnexpectedError(msg) =>
         ErrorResponse.internalServerError(detail = Some(msg))
       case PresentationError.IssuedCredentialNotFoundError(_) =>