diff --git a/src/ngcft1.cpp b/src/ngcft1.cpp
index 69fdd22..909e233 100644
--- a/src/ngcft1.cpp
+++ b/src/ngcft1.cpp
@@ -132,6 +132,13 @@ void NGCFT1::updateSendTransfer(float time_delta, uint32_t group_number, uint32_
 				if (tf.inits_sent >= 3) {
 					// delete, timed out 3 times
 					std::cerr << "NGCFT1 warning: ft init timed out, deleting\n";
+					dispatch(
+						NGCFT1_Event::send_done,
+						Events::NGCFT1_send_done{
+							group_number, peer_number,
+							static_cast<uint8_t>(idx),
+						}
+					);
 					tf_opt.reset();
 				} else {
 					// timed out, resend
@@ -158,8 +165,14 @@ void NGCFT1::updateSendTransfer(float time_delta, uint32_t group_number, uint32_
 
 				if (tf.time_since_activity >= sending_give_up_after) {
 					// no ack after 30sec, close ft
-					// TODO: notify app
 					std::cerr << "NGCFT1 warning: sending ft in progress timed out, deleting\n";
+					dispatch(
+						NGCFT1_Event::send_done,
+						Events::NGCFT1_send_done{
+							group_number, peer_number,
+							static_cast<uint8_t>(idx),
+						}
+					);
 
 					// clean up cca
 					tf.ssb.for_each(time_delta, [&](uint16_t id, const std::vector<uint8_t>& data, float& time_since_activity) {
diff --git a/src/ngcft1.hpp b/src/ngcft1.hpp
index 131f5c7..360a827 100644
--- a/src/ngcft1.hpp
+++ b/src/ngcft1.hpp
@@ -67,14 +67,34 @@ namespace Events {
 		size_t data_size;
 	};
 
+	struct NGCFT1_recv_done {
+		uint32_t group_number;
+		uint32_t peer_number;
+
+		uint8_t transfer_id;
+		// TODO: reason
+	};
+
+	struct NGCFT1_send_done {
+		uint32_t group_number;
+		uint32_t peer_number;
+
+		uint8_t transfer_id;
+		// TODO: reason
+	};
+
 } // Events
 
 enum class NGCFT1_Event : uint8_t {
 	recv_request,
 	recv_init,
+
 	recv_data,
 	send_data,
 
+	recv_done,
+	send_done,
+
 	MAX
 };
 
@@ -84,6 +104,8 @@ struct NGCFT1EventI {
 	virtual bool onEvent(const Events::NGCFT1_recv_init&) { return false; }
 	virtual bool onEvent(const Events::NGCFT1_recv_data&) { return false; }
 	virtual bool onEvent(const Events::NGCFT1_send_data&) { return false; } // const?
+	virtual bool onEvent(const Events::NGCFT1_recv_done&) { return false; }
+	virtual bool onEvent(const Events::NGCFT1_send_done&) { return false; }
 };
 
 using NGCFT1EventProviderI = EventProviderI<NGCFT1EventI>;