diff --git a/src/fsfw/cfdp/handler/PutRequest.cpp b/src/fsfw/cfdp/handler/PutRequest.cpp
index fa84592e..daefcca8 100644
--- a/src/fsfw/cfdp/handler/PutRequest.cpp
+++ b/src/fsfw/cfdp/handler/PutRequest.cpp
@@ -2,9 +2,18 @@
 
 using namespace returnvalue;
 
-[[nodiscard]] bool cfdp::PutRequest::isMetadataOnly() const {
-  return destNameSize > 0 and sourceNameSize > 0;
-}
+cfdp::PutRequest::PutRequest(cfdp::EntityId destId, const uint8_t *msgsToUser,
+                             size_t msgsToUserTotalSize, const uint8_t *fsRequests,
+                             size_t fsRequestsSize)
+    : destId(std::move(destId)),
+      metadataOnly(true),
+      msgsToUsersTotalSize(msgsToUserTotalSize),
+      msgsToUserStartPtr(msgsToUser),
+      fsRequestsTotalSize(fsRequestsSize),
+      fsRequestStartPtr(fsRequests) {}
+
+[[nodiscard]] bool cfdp::PutRequest::isMetadataOnly() const { return metadataOnly; }
+
 ReturnValue_t cfdp::PutRequest::serialize(uint8_t **buffer, size_t *size, size_t maxSize,
                                           SerializeIF::Endianness streamEndianness) const {
   ReturnValue_t result = destId.serialize(buffer, size, maxSize, streamEndianness);
@@ -16,11 +25,6 @@ ReturnValue_t cfdp::PutRequest::serialize(uint8_t **buffer, size_t *size, size_t
   }
   **buffer = metadataOnly;
   *size += 1;
-  if (transmissionMode) {
-    **buffer = transmissionMode;
-    *size += 1;
-    *buffer += 1;
-  }
   if (!metadataOnly) {
     result = SerializeAdapter::serialize(&sourceNameSize, buffer, size, maxSize, streamEndianness);
     if (result != OK) {
@@ -52,11 +56,7 @@ ReturnValue_t cfdp::PutRequest::serialize(uint8_t **buffer, size_t *size, size_t
   if (result != OK) {
     return result;
   }
-  result = SerializeAdapter::serialize(&numOfMsgsToUser, buffer, size, maxSize, streamEndianness);
-  if (result != OK) {
-    return result;
-  }
-  std::memcpy(*buffer, messagesToUserStartPtr, msgsToUsersTotalSize);
+  std::memcpy(*buffer, msgsToUserStartPtr, msgsToUsersTotalSize);
   *buffer += msgsToUsersTotalSize;
   *size += msgsToUsersTotalSize;
 
@@ -65,11 +65,7 @@ ReturnValue_t cfdp::PutRequest::serialize(uint8_t **buffer, size_t *size, size_t
   if (result != OK) {
     return result;
   }
-  result = SerializeAdapter::serialize(&numOfFsRequests, buffer, size, maxSize, streamEndianness);
-  if (result != OK) {
-    return result;
-  }
-  std::memcpy(*buffer, fsRequest, fsRequestsTotalSize);
+  std::memcpy(*buffer, fsRequestStartPtr, fsRequestsTotalSize);
   *buffer += fsRequestsTotalSize;
   *size += fsRequestsTotalSize;
   return OK;
@@ -84,7 +80,7 @@ size_t cfdp::PutRequest::getSerializedSize() const {
   if (!metadataOnly) {
     baseSize += sizeof(sourceNameSize) + sourceNameSize + sizeof(destNameSize) + destNameSize + 2;
   }
-  baseSize += sizeof(msgsToUsersTotalSize) + sizeof(numOfMsgsToUser) + msgsToUsersTotalSize +
-              sizeof(fsRequestsTotalSize) + sizeof(numOfFsRequests) + fsRequestsTotalSize;
+  baseSize += sizeof(msgsToUsersTotalSize) + msgsToUsersTotalSize + sizeof(fsRequestsTotalSize) +
+              fsRequestsTotalSize;
   return baseSize;
 }
diff --git a/src/fsfw/cfdp/handler/PutRequest.h b/src/fsfw/cfdp/handler/PutRequest.h
index 5f47a7ad..8009e0f8 100644
--- a/src/fsfw/cfdp/handler/PutRequest.h
+++ b/src/fsfw/cfdp/handler/PutRequest.h
@@ -12,14 +12,17 @@ namespace cfdp {
 class PutRequest : public SerializeIF {
  public:
   EntityId destId;
-  bool metadataOnly = true;
-  char* destName = nullptr;
-  uint64_t destNameSize = 0;
-  char* sourceName = nullptr;
-  uint64_t sourceNameSize = 0;
-  TransmissionMode transmissionMode = TransmissionMode::UNACKNOWLEDGED;
-  bool closureRequested = false;
 
+  /**
+   * Metadata only constructor.
+   * @param destId
+   * @param msgsToUser
+   * @param msgsToUserTotalSize
+   * @param fsRequests
+   * @param fsRequestsSize
+   */
+  PutRequest(EntityId destId, const uint8_t* msgsToUser, size_t msgsToUserTotalSize,
+             const uint8_t* fsRequests, size_t fsRequestsSize);
   [[nodiscard]] ReturnValue_t serialize(uint8_t** buffer, size_t* size, size_t maxSize,
                                         Endianness streamEndianness) const override;
   ReturnValue_t deSerialize(const uint8_t** buffer, size_t* size,
@@ -28,12 +31,19 @@ class PutRequest : public SerializeIF {
   [[nodiscard]] bool isMetadataOnly() const;
 
  private:
+  bool metadataOnly = true;
+  // Transaction parameters. Omitted if the put request is metadata only.
+  char* destName = nullptr;
+  uint64_t destNameSize = 0;
+  char* sourceName = nullptr;
+  uint64_t sourceNameSize = 0;
+  TransmissionMode transmissionMode = TransmissionMode::UNACKNOWLEDGED;
+  bool closureRequested = false;
+  // Metadata
   size_t msgsToUsersTotalSize = 0;
-  uint32_t numOfMsgsToUser = 0;
-  uint8_t* messagesToUserStartPtr = nullptr;
+  const uint8_t* msgsToUserStartPtr = nullptr;
   size_t fsRequestsTotalSize = 0;
-  uint32_t numOfFsRequests = 0;
-  uint8_t* fsRequest = nullptr;
+  const uint8_t* fsRequestStartPtr = nullptr;
 };
 
 }  // namespace cfdp