diff --git a/telegram/commands.go b/telegram/commands.go
index 3c899ed..596f4a9 100644
--- a/telegram/commands.go
+++ b/telegram/commands.go
@@ -504,6 +504,9 @@ func (c *Client) ProcessTransportCommand(cmdline string, resource string) string
 		if err != nil {
 			return err.Error()
 		}
+		if contact == nil {
+			return "Contact not found"
+		}
 
 		text := rawCmdArguments(cmdline, 1)
 		_, err = c.client.ReportChat(&client.ReportChatRequest{
@@ -812,6 +815,9 @@ func (c *Client) ProcessChatCommand(chatID int64, cmdline string) (string, bool)
 		if err != nil {
 			return err.Error(), true
 		}
+		if contact == nil {
+			return "Contact not found", true
+		}
 
 		_, err = c.client.AddChatMember(&client.AddChatMemberRequest{
 			ChatId:       chatID,
@@ -836,6 +842,9 @@ func (c *Client) ProcessChatCommand(chatID int64, cmdline string) (string, bool)
 		if err != nil {
 			return err.Error(), true
 		}
+		if contact == nil {
+			return "Contact not found", true
+		}
 
 		_, err = c.client.SetChatMemberStatus(&client.SetChatMemberStatusRequest{
 			ChatId:   chatID,
@@ -851,6 +860,9 @@ func (c *Client) ProcessChatCommand(chatID int64, cmdline string) (string, bool)
 		if err != nil {
 			return err.Error(), true
 		}
+		if contact == nil {
+			return "Contact not found", true
+		}
 
 		var hours int64
 		if len(args) > 1 {
@@ -878,6 +890,9 @@ func (c *Client) ProcessChatCommand(chatID int64, cmdline string) (string, bool)
 		if err != nil {
 			return err.Error(), true
 		}
+		if contact == nil {
+			return "Contact not found", true
+		}
 
 		_, err = c.client.SetChatMemberStatus(&client.SetChatMemberStatusRequest{
 			ChatId:   chatID,
@@ -897,6 +912,9 @@ func (c *Client) ProcessChatCommand(chatID int64, cmdline string) (string, bool)
 		if err != nil {
 			return err.Error(), true
 		}
+		if contact == nil {
+			return "Contact not found", true
+		}
 
 		var hours int64
 		if len(args) > 1 {
@@ -922,6 +940,9 @@ func (c *Client) ProcessChatCommand(chatID int64, cmdline string) (string, bool)
 		if err != nil {
 			return err.Error(), true
 		}
+		if contact == nil {
+			return "Contact not found", true
+		}
 
 		_, err = c.client.SetChatMemberStatus(&client.SetChatMemberStatusRequest{
 			ChatId:   chatID,
@@ -937,6 +958,9 @@ func (c *Client) ProcessChatCommand(chatID int64, cmdline string) (string, bool)
 		if err != nil {
 			return err.Error(), true
 		}
+		if contact == nil {
+			return "Contact not found", true
+		}
 
 		// clone the permissions
 		status := client.ChatMemberStatusAdministrator{
@@ -1006,6 +1030,9 @@ func (c *Client) ProcessChatCommand(chatID int64, cmdline string) (string, bool)
 		if err != nil {
 			return err.Error(), true
 		}
+		if chat == nil {
+			return "Chat not found", true
+		}
 
 		chatType := chat.Type.ChatTypeType()
 		if chatType == client.TypeChatTypeSecret {