diff --git a/adnl/adnl-message.cpp b/adnl/adnl-message.cpp
index 0d712978..1d3ba5f8 100644
--- a/adnl/adnl-message.cpp
+++ b/adnl/adnl-message.cpp
@@ -46,6 +46,9 @@ AdnlMessage::AdnlMessage(tl_object_ptr<ton_api::adnl_Message> message) {
           [&](ton_api::adnl_message_part &msg) {
             message_ = adnlmessage::AdnlMessagePart{msg.hash_, static_cast<td::uint32>(msg.total_size_),
                                                     static_cast<td::uint32>(msg.offset_), std::move(msg.data_)};
+          },
+          [&](ton_api::adnl_message_queryError &msg) {
+            message_ = adnlmessage::AdnlMessageQueryError{msg.query_id_};
           }));
 }
 
diff --git a/adnl/adnl-message.h b/adnl/adnl-message.h
index 43849e98..d557c319 100644
--- a/adnl/adnl-message.h
+++ b/adnl/adnl-message.h
@@ -170,6 +170,24 @@ class AdnlMessageAnswer {
   td::BufferSlice data_;
 };
 
+class AdnlMessageQueryError {
+ public:
+  explicit AdnlMessageQueryError(AdnlQueryId query_id) : query_id_(query_id) {
+  }
+  const auto &query_id() const {
+    return query_id_;
+  }
+  td::uint32 size() const {
+    return 36;
+  }
+  tl_object_ptr<ton_api::adnl_Message> tl() const {
+    return create_tl_object<ton_api::adnl_message_queryError>(query_id_);
+  }
+
+ private:
+  AdnlQueryId query_id_;
+};
+
 class AdnlMessagePart {
  public:
   AdnlMessagePart(td::Bits256 hash, td::uint32 total_size, td::uint32 offset, td::BufferSlice data)
@@ -220,7 +238,8 @@ class AdnlMessage {
  private:
   td::Variant<Empty, adnlmessage::AdnlMessageCreateChannel, adnlmessage::AdnlMessageConfirmChannel,
               adnlmessage::AdnlMessageCustom, adnlmessage::AdnlMessageNop, adnlmessage::AdnlMessageReinit,
-              adnlmessage::AdnlMessageQuery, adnlmessage::AdnlMessageAnswer, adnlmessage::AdnlMessagePart>
+              adnlmessage::AdnlMessageQuery, adnlmessage::AdnlMessageAnswer, adnlmessage::AdnlMessagePart,
+              adnlmessage::AdnlMessageQueryError>
       message_{Empty{}};
 
  public:
diff --git a/adnl/adnl-peer.cpp b/adnl/adnl-peer.cpp
index 35ba2a11..1d73b8f6 100644
--- a/adnl/adnl-peer.cpp
+++ b/adnl/adnl-peer.cpp
@@ -524,10 +524,14 @@ void AdnlPeerPairImpl::process_message(const adnlmessage::AdnlMessageQuery &mess
                                        flags = static_cast<td::uint32>(0)](td::Result<td::BufferSlice> R) {
     if (R.is_error()) {
       LOG(WARNING) << "failed to answer query: " << R.move_as_error();
+      td::actor::send_closure(SelfId, &AdnlPeerPairImpl::send_message,
+                              OutboundAdnlMessage{adnlmessage::AdnlMessageQueryError{query_id}, flags});
     } else {
       auto data = R.move_as_ok();
       if (data.size() > Adnl::huge_packet_max_size()) {
         LOG(WARNING) << "dropping too big answer query: size=" << data.size();
+        td::actor::send_closure(SelfId, &AdnlPeerPairImpl::send_message,
+                                OutboundAdnlMessage{adnlmessage::AdnlMessageQueryError{query_id}, flags});
       } else {
         td::actor::send_closure(SelfId, &AdnlPeerPairImpl::send_message,
                                 OutboundAdnlMessage{adnlmessage::AdnlMessageAnswer{query_id, std::move(data)}, flags});
@@ -609,6 +613,18 @@ void AdnlPeerPairImpl::process_message(const adnlmessage::AdnlMessagePart &messa
   }
 }
 
+void AdnlPeerPairImpl::process_message(const adnlmessage::AdnlMessageQueryError &message) {
+  auto Q = out_queries_.find(message.query_id());
+
+  if (Q == out_queries_.end()) {
+    VLOG(ADNL_NOTICE) << this << ": dropping IN query error: unknown query id " << message.query_id();
+    return;
+  }
+
+  td::actor::send_closure_later(Q->second, &AdnlQuery::reject_query);
+  out_queries_.erase(Q);
+}
+
 void AdnlPeerPairImpl::delete_query(AdnlQueryId id) {
   auto Q = out_queries_.find(id);
 
diff --git a/adnl/adnl-peer.hpp b/adnl/adnl-peer.hpp
index 410c0f75..ec7166ed 100644
--- a/adnl/adnl-peer.hpp
+++ b/adnl/adnl-peer.hpp
@@ -104,6 +104,7 @@ class AdnlPeerPairImpl : public AdnlPeerPair {
   void process_message(const adnlmessage::AdnlMessageQuery &message);
   void process_message(const adnlmessage::AdnlMessageAnswer &message);
   void process_message(const adnlmessage::AdnlMessagePart &message);
+  void process_message(const adnlmessage::AdnlMessageQueryError &message);
   void process_message(const AdnlMessage::Empty &message) {
     UNREACHABLE();
   }
diff --git a/adnl/adnl-query.cpp b/adnl/adnl-query.cpp
index 5bc767d2..40e9be80 100644
--- a/adnl/adnl-query.cpp
+++ b/adnl/adnl-query.cpp
@@ -25,13 +25,17 @@ namespace ton {
 namespace adnl {
 
 void AdnlQuery::alarm() {
-  promise_.set_error(td::Status::Error(ErrorCode::timeout, "adnl query timeout"));
+  promise_.set_error(td::Status::Error(ErrorCode::timeout, PSTRING() << "timeout for adnl query " << name_));
   stop();
 }
 void AdnlQuery::result(td::BufferSlice data) {
   promise_.set_value(std::move(data));
   stop();
 }
+void AdnlQuery::reject_query() {
+  promise_.set_error(td::Status::Error(ErrorCode::timeout, PSTRING() << "rejected adnl query " << name_));
+  stop();
+}
 
 AdnlQueryId AdnlQuery::random_query_id() {
   AdnlQueryId q_id;
diff --git a/adnl/adnl-query.h b/adnl/adnl-query.h
index 6e24a49f..2a78615a 100644
--- a/adnl/adnl-query.h
+++ b/adnl/adnl-query.h
@@ -48,6 +48,7 @@ class AdnlQuery : public td::actor::Actor {
   }
   void alarm() override;
   void result(td::BufferSlice data);
+  void reject_query();
   void start_up() override {
     alarm_timestamp() = timeout_;
   }
diff --git a/rldp/rldp-in.hpp b/rldp/rldp-in.hpp
index b4981999..8850ccf9 100644
--- a/rldp/rldp-in.hpp
+++ b/rldp/rldp-in.hpp
@@ -78,6 +78,8 @@ class RldpIn : public RldpImpl {
                      td::uint64 max_answer_size) override;
   void answer_query(adnl::AdnlNodeIdShort src, adnl::AdnlNodeIdShort dst, td::Timestamp timeout,
                     adnl::AdnlQueryId query_id, TransferId transfer_id, td::BufferSlice data);
+  void reject_query(adnl::AdnlNodeIdShort src, adnl::AdnlNodeIdShort dst, td::Timestamp timeout,
+                    adnl::AdnlQueryId query_id, TransferId transfer_id);
 
   void alarm_query(adnl::AdnlQueryId query_id, TransferId transfer_id);
 
@@ -93,6 +95,8 @@ class RldpIn : public RldpImpl {
                        ton_api::rldp_query &message);
   void process_message(adnl::AdnlNodeIdShort source, adnl::AdnlNodeIdShort local_id, TransferId transfer_id,
                        ton_api::rldp_answer &message);
+  void process_message(adnl::AdnlNodeIdShort source, adnl::AdnlNodeIdShort local_id, TransferId transfer_id,
+                       ton_api::rldp_queryError &message);
   void receive_message(adnl::AdnlNodeIdShort source, adnl::AdnlNodeIdShort local_id, TransferId transfer_id,
                        td::BufferSlice data);
 
diff --git a/rldp/rldp.cpp b/rldp/rldp.cpp
index 9b38dcb8..a1d45926 100644
--- a/rldp/rldp.cpp
+++ b/rldp/rldp.cpp
@@ -87,6 +87,13 @@ void RldpIn::answer_query(adnl::AdnlNodeIdShort src, adnl::AdnlNodeIdShort dst,
   transfer(src, dst, timeout, std::move(B), transfer_id);
 }
 
+void RldpIn::reject_query(adnl::AdnlNodeIdShort src, adnl::AdnlNodeIdShort dst, td::Timestamp timeout,
+                          adnl::AdnlQueryId query_id, TransferId transfer_id) {
+  auto B = serialize_tl_object(create_tl_object<ton_api::rldp_queryError>(query_id), true);
+
+  transfer(src, dst, timeout, std::move(B), transfer_id);
+}
+
 void RldpIn::alarm_query(adnl::AdnlQueryId query_id, TransferId transfer_id) {
   queries_.erase(query_id);
   max_size_.erase(transfer_id);
@@ -199,12 +206,16 @@ void RldpIn::process_message(adnl::AdnlNodeIdShort source, adnl::AdnlNodeIdShort
       auto data = R.move_as_ok();
       if (data.size() > max_answer_size) {
         VLOG(RLDP_NOTICE) << "rldp query failed: answer too big";
+        td::actor::send_closure(SelfId, &RldpIn::reject_query, local_id, source, timeout, query_id,
+                                transfer_id ^ TransferId::ones());
       } else {
         td::actor::send_closure(SelfId, &RldpIn::answer_query, local_id, source, timeout, query_id,
                                 transfer_id ^ TransferId::ones(), std::move(data));
       }
     } else {
       VLOG(RLDP_NOTICE) << "rldp query failed: " << R.move_as_error();
+      td::actor::send_closure(SelfId, &RldpIn::reject_query, local_id, source, timeout, query_id,
+                              transfer_id ^ TransferId::ones());
     }
   });
   VLOG(RLDP_DEBUG) << "delivering rldp query";
@@ -223,6 +234,17 @@ void RldpIn::process_message(adnl::AdnlNodeIdShort source, adnl::AdnlNodeIdShort
   }
 }
 
+void RldpIn::process_message(adnl::AdnlNodeIdShort source, adnl::AdnlNodeIdShort local_id, TransferId transfer_id,
+                             ton_api::rldp_queryError &message) {
+  auto it = queries_.find(message.query_id_);
+  if (it != queries_.end()) {
+    td::actor::send_closure(it->second, &adnl::AdnlQuery::reject_query);
+    queries_.erase(it);
+  } else {
+    VLOG(RLDP_INFO) << "received reject to unknown query " << message.query_id_;
+  }
+}
+
 void RldpIn::transfer_completed(TransferId transfer_id) {
   senders_.erase(transfer_id);
   VLOG(RLDP_DEBUG) << "rldp: completed transfer " << transfer_id << "; " << senders_.size() << " out transfer pending ";
diff --git a/rldp2/rldp-in.hpp b/rldp2/rldp-in.hpp
index c2e46d2a..a815004c 100644
--- a/rldp2/rldp-in.hpp
+++ b/rldp2/rldp-in.hpp
@@ -76,6 +76,8 @@ class RldpIn : public RldpImpl {
                      td::uint64 max_answer_size) override;
   void answer_query(adnl::AdnlNodeIdShort src, adnl::AdnlNodeIdShort dst, td::Timestamp timeout,
                     adnl::AdnlQueryId query_id, TransferId transfer_id, td::BufferSlice data);
+  void reject_query(adnl::AdnlNodeIdShort src, adnl::AdnlNodeIdShort dst, td::Timestamp timeout,
+                    adnl::AdnlQueryId query_id, TransferId transfer_id);
 
   void receive_message_part(adnl::AdnlNodeIdShort source, adnl::AdnlNodeIdShort local_id, td::BufferSlice data);
 
@@ -85,6 +87,8 @@ class RldpIn : public RldpImpl {
                        ton_api::rldp_query &message);
   void process_message(adnl::AdnlNodeIdShort source, adnl::AdnlNodeIdShort local_id, TransferId transfer_id,
                        ton_api::rldp_answer &message);
+  void process_message(adnl::AdnlNodeIdShort source, adnl::AdnlNodeIdShort local_id, TransferId transfer_id,
+                       ton_api::rldp_queryError &message);
   void receive_message(adnl::AdnlNodeIdShort source, adnl::AdnlNodeIdShort local_id, TransferId transfer_id,
                        td::Result<td::BufferSlice> data);
 
diff --git a/rldp2/rldp.cpp b/rldp2/rldp.cpp
index 765e38a5..34abd78e 100644
--- a/rldp2/rldp.cpp
+++ b/rldp2/rldp.cpp
@@ -118,6 +118,13 @@ void RldpIn::answer_query(adnl::AdnlNodeIdShort src, adnl::AdnlNodeIdShort dst,
   send_closure(create_connection(src, dst), &RldpConnectionActor::send, transfer_id, std::move(B), timeout);
 }
 
+void RldpIn::reject_query(adnl::AdnlNodeIdShort src, adnl::AdnlNodeIdShort dst, td::Timestamp timeout,
+                          adnl::AdnlQueryId query_id, TransferId transfer_id) {
+  auto B = serialize_tl_object(create_tl_object<ton_api::rldp_queryError>(query_id), true);
+
+  send_closure(create_connection(src, dst), &RldpConnectionActor::send, transfer_id, std::move(B), timeout);
+}
+
 void RldpIn::receive_message_part(adnl::AdnlNodeIdShort source, adnl::AdnlNodeIdShort local_id, td::BufferSlice data) {
   send_closure(create_connection(local_id, source), &RldpConnectionActor::receive_raw, std::move(data));
 }
@@ -174,12 +181,16 @@ void RldpIn::process_message(adnl::AdnlNodeIdShort source, adnl::AdnlNodeIdShort
       auto data = R.move_as_ok();
       if (data.size() > max_answer_size) {
         VLOG(RLDP_NOTICE) << "rldp query failed: answer too big";
+        td::actor::send_closure(SelfId, &RldpIn::reject_query, local_id, source, timeout, query_id,
+                                transfer_id ^ TransferId::ones());
       } else {
         td::actor::send_closure(SelfId, &RldpIn::answer_query, local_id, source, timeout, query_id,
                                 transfer_id ^ TransferId::ones(), std::move(data));
       }
     } else {
       VLOG(RLDP_NOTICE) << "rldp query failed: " << R.move_as_error();
+      td::actor::send_closure(SelfId, &RldpIn::reject_query, local_id, source, timeout, query_id,
+                              transfer_id ^ TransferId::ones());
     }
   });
   VLOG(RLDP_DEBUG) << "delivering rldp query";
@@ -198,6 +209,17 @@ void RldpIn::process_message(adnl::AdnlNodeIdShort source, adnl::AdnlNodeIdShort
   }
 }
 
+void RldpIn::process_message(adnl::AdnlNodeIdShort source, adnl::AdnlNodeIdShort local_id, TransferId transfer_id,
+                             ton_api::rldp_queryError &message) {
+  auto it = queries_.find(transfer_id);
+  if (it != queries_.end()) {
+    it->second.set_error(td::Status::Error("rejected"));
+    queries_.erase(it);
+  } else {
+    VLOG(RLDP_INFO) << "received reject to unknown query " << message.query_id_;
+  }
+}
+
 void RldpIn::on_sent(TransferId transfer_id, td::Result<td::Unit> state) {
   //TODO: completed transfer
 }
diff --git a/tl/generate/scheme/ton_api.tl b/tl/generate/scheme/ton_api.tl
index 3a81ab58..9f1072ce 100644
--- a/tl/generate/scheme/ton_api.tl
+++ b/tl/generate/scheme/ton_api.tl
@@ -136,6 +136,7 @@ adnl.message.reinit date:int = adnl.Message;
 
 adnl.message.query query_id:int256 query:bytes = adnl.Message;
 adnl.message.answer query_id:int256 answer:bytes = adnl.Message;
+adnl.message.queryError query_id:int256 = adnl.Message;
 
 adnl.message.part hash:int256 total_size:int offset:int data:bytes = adnl.Message;
 
@@ -161,6 +162,7 @@ rldp.complete transfer_id:int256 part:int = rldp.MessagePart;
 rldp.message id:int256 data:bytes = rldp.Message;
 rldp.query query_id:int256 max_answer_size:long timeout:int data:bytes = rldp.Message;
 rldp.answer query_id:int256 data:bytes = rldp.Message;
+rldp.queryError query_id:int256 = rldp.Message;
 
 
 ---functions---
diff --git a/tl/generate/scheme/ton_api.tlo b/tl/generate/scheme/ton_api.tlo
index 479455fe..95a2144a 100644
Binary files a/tl/generate/scheme/ton_api.tlo and b/tl/generate/scheme/ton_api.tlo differ