diff --git a/zbxtg.sh b/zbxtg.sh
index f9c9663..6afad26 100755
--- a/zbxtg.sh
+++ b/zbxtg.sh
@@ -41,47 +41,78 @@ TO=$1
 SUBJECT=$2
 BODY=$3
 
-TG_CHAT=0 # send message to chat or to private chat to user
+TG_GROUP=0 # send message to chat or to private chat to user
+TG_CHANNEL=0 # send message to channel
 METHOD="txt" # sendMessage (simple text) or sendPhoto (attached image)
 
 echo "${BODY}" | grep -q "${ZBX_TG_PREFIX};graphs" && METHOD="image"
-echo "${BODY}" | grep -q "${ZBX_TG_PREFIX};chat" && TG_CHAT=1
+echo "${BODY}" | grep -q "${ZBX_TG_PREFIX};chat" && TG_GROUP=1
+echo "${BODY}" | grep -q "${ZBX_TG_PREFIX};group" && TG_GROUP=1
 echo "${BODY}" | grep -q "${ZBX_TG_PREFIX};debug" && ISDEBUG="TRUE"
+echo "${BODY}" | grep -q "${ZBX_TG_PREFIX};channel" && TG_CHANNEL=1
 
 IS_DEBUG && LOG="${TMP_DIR}/debug.${TS}.log"
 IS_DEBUG && echo -e "TMP_DIR=${TMP_DIR}\nTMP_COOKIE=${TMP_COOKIE}\nTMP_UIDS=${TMP_UIDS}" >>${LOG}
 
-if [ "${TG_CHAT}" -eq 1 ]
+if [ "${TG_GROUP}" -eq 1 ]
 then
-    TG_CONTACT_TYPE="chat"
+    TG_CONTACT_TYPE="group"
 else
-    TG_CONTACT_TYPE="user"
+    TG_CONTACT_TYPE="private"
 fi
 
 TG_CHAT_ID=$(cat ${TMP_UIDS} | awk -F ';' '{if ($1 == "'${TO}'" && $2 == "'${TG_CONTACT_TYPE}'") print $3}' | tail -1)
 
+if [ "${TG_CHANNEL}" -eq 1 ]
+then
+    TG_CHAT_ID="${TO}"
+fi
+
 if [ -z "${TG_CHAT_ID}" ]
 then
-    TG_UPDATES=$(${CURL_TG}/getUpdates)
-    if [ "${TG_CHAT}" -eq 1 ]
-    then
-        TG_CHAT_ID=$(echo "${TG_UPDATES}" | sed -e 's/["}{]//g' | awk -F ',' '{if ($8 == "type:group" && $7 == "title:'${TO}'") {gsub("chat:id:", "", $6); print $6}}' | tail -1)
-    else
-        TG_CHAT_ID=$(echo "${TG_UPDATES}" | sed -e 's/["}{]//g' | awk -F ',' '{if ($10 == "type:private" && $5 == "username:'${TO}'") {gsub("chat:id:", "", $6); print $6}}' | tail -1)
-    fi
+    TG_UPDATES=$(${CURL_TG}/getUpdates | sed -e 's/},{/\n/')
+    for (( idx=${#TG_UPDATES[@]}-1 ; idx>=0 ; idx-- ))
+    do
+        UPDATE="${TG_UPDATES[idx]}"
+        echo "${UPDATE}"
+        if [ "${TG_GROUP}" -eq 1 ]
+        then
+            TG_CHAT_ID=$(echo "${UPDATE}" | sed -e 's/["}{]//g' | awk -F ',' '{if ($8 == "type:group" && $7 == "title:'${TO}'") {gsub("chat:id:", "", $6); print $6}}' | tail -1)
+            if [ "$(echo ${TG_CHAT_ID} | grep -Eq '\-[0-9]+' && echo 1 || echo 0)" -eq 1 ]
+            then
+                break
+            fi
+        else
+            TG_CHAT_ID=$(echo "${UPDATE}" | sed -e 's/["}{]//g' | awk -F ',' '{if ($10 == "type:private" && $5 == "username:'${TO}'") {gsub("chat:id:", "", $6); print $6}}' | tail -1)
+            if [ "$(echo ${TG_CHAT_ID} | grep -Eq '[0-9]+' && echo 1 || echo 0)" -eq 1 ]
+            then
+                break
+            fi
+        fi
+    done
     echo "${TO};${TG_CONTACT_TYPE};${TG_CHAT_ID}" >>${TMP_UIDS}
 fi
 
 IS_DEBUG && echo "TG_CHAT_ID: ${TG_CHAT_ID}" >>${LOG}
 
-TG_TEXT=$(echo "${BODY}" | grep -vE "^${ZBX_TG_PREFIX};"; echo "--"; echo "${ZBX_SERVER}")
+TG_TEXT=$(echo "${BODY}" | grep -vE "^${ZBX_TG_PREFIX};")
+if [ "${ZBX_TG_SIGN}" != "FALSE" ]
+then
+    TG_TEXT=$(echo ${TG_TEXT}; echo "--"; echo "${ZBX_SERVER}")
+fi
 
 case "${METHOD}" in
 
     "txt")
         TG_MESSAGE=$(echo -e "${SUBJECT}\n${TG_TEXT}")
         IS_DEBUG && echo "${CURL_TG}/sendMessage -F \"chat_id=${TG_CHAT_ID}\" -F \"text=${TG_MESSAGE}\"" >>${LOG}
-        ${CURL_TG}/sendMessage -F "chat_id=${TG_CHAT_ID}" -F "text=${TG_MESSAGE}" >>${LOG} 2>&1
+        ANSWER=$(${CURL_TG}/sendMessage?chat_id=${TG_CHAT_ID} --form "text=${TG_MESSAGE}" 2>&1)
+        if [ "$(echo "${ANSWER}" | grep -Ec 'migrated.*supergroup')" -eq 1 ]
+        then
+            migrate_to_chat_id=$(echo "${ANSWER}" | sed -e 's/["}{]//g' | grep -Eo '\-[0-9]+$')
+            echo "${TO};${TG_CONTACT_TYPE};${migrate_to_chat_id}" >>${TMP_UIDS}
+            ANSWER=$(${CURL_TG}/sendMessage?chat_id=${migrate_to_chat_id} --form "text=${TG_MESSAGE}" 2>&1)
+        fi
     ;;
 
     "image")
@@ -101,8 +132,8 @@ case "${METHOD}" in
         then
             echo "${ZBX_TG_PREFIX}: probably you will see MEDIA_CAPTION_TOO_LONG error, the message has been cut to 200 symbols, https://github.com/ableev/Zabbix-in-Telegram/issues/9#issuecomment-166895044"
         fi
-        IS_DEBUG && echo "${CURL_TG}/sendPhoto -F \"chat_id=${TG_CHAT_ID}\" -F \"caption=${TG_CAPTION}\" -F \"photo=@${CACHE_IMAGE}\"" >>${LOG}
-        ${CURL_TG}/sendPhoto -F "chat_id=${TG_CHAT_ID}" -F "caption=${TG_CAPTION}" -F "photo=@${CACHE_IMAGE}" >>${LOG} 2>&1
+        IS_DEBUG && echo "${CURL_TG}/sendPhoto?chat_id=${TG_CHAT_ID}\" --form \"caption=${TG_CAPTION}\" -F \"photo=@${CACHE_IMAGE}\"" >>${LOG}
+        ANSWER=$(${CURL_TG}/sendPhoto?chat_id=${TG_CHAT_ID} --form "caption=${TG_CAPTION}" -F "photo=@${CACHE_IMAGE}")
         IS_DEBUG || rm ${CACHE_IMAGE}
     ;;