diff --git a/doc/sq_srvinv01.puml b/doc/sq_srvinv01.puml
new file mode 100644
index 0000000..67c2e14
--- /dev/null
+++ b/doc/sq_srvinv01.puml
@@ -0,0 +1,12 @@
+@startuml Server Invitation Step 01
+User -> Bastet : fill invitation
+User -> Bastet : select servers
+Bastet -> NativeLib : get server cards for selected uids
+NativeLib -> Bastet : server cards
+Bastet -> NativeLib : invitationCreateMessage
+NativeLib -> Bastet : invitationMessage
+Bastet -> Server : send invitation
+Server -> Redis : Store invitation
+Server -> Bastet : invitation URL
+Bastet -> User : invitation URL
+@enduml 
\ No newline at end of file
diff --git a/doc/sq_srvinv02.puml b/doc/sq_srvinv02.puml
new file mode 100644
index 0000000..7e2ac17
--- /dev/null
+++ b/doc/sq_srvinv02.puml
@@ -0,0 +1,11 @@
+@startuml Server Invitation Step 02
+User -> Bastet : paste URL
+Bastet -> NativeLib : build invitationGetMessage
+NativeLib -> Bastet : invitationGetMessage
+Bastet -> Server : send invitationGetMessage
+Redis -> Server : retrieve invitation
+Server -> Bastet : invitation message
+Bastet -> NativeLib : please invitation message
+NativeLib -> Bastet : invitation message
+Bastet -> User : invitation data
+@enduml 
\ No newline at end of file
diff --git a/doc/sq_srvinv03.puml b/doc/sq_srvinv03.puml
new file mode 100644
index 0000000..90b0594
--- /dev/null
+++ b/doc/sq_srvinv03.puml
@@ -0,0 +1,12 @@
+
+@startuml Server Invitation Step 03
+User -> Bastet : select servers
+User -> Bastet : accept invitation
+Bastet -> NativeLib : accept invitation
+Bastet -> NativeLib : build accept message
+NativeLib -> Bastet : invitationGetMessage
+Bastet -> Server : send accept message
+Server -> Redis : store accept message
+Server -> Bastet : accept message ok
+Bastet -> User : msg sent
+@enduml 
\ No newline at end of file
diff --git a/doc/sq_srvinv04.puml b/doc/sq_srvinv04.puml
new file mode 100644
index 0000000..2a85d36
--- /dev/null
+++ b/doc/sq_srvinv04.puml
@@ -0,0 +1,10 @@
+
+@startuml Server Invitation Step 03
+Bastet -> NativeLib : periodic message check
+Bastet -> NativeLib : build accept message
+NativeLib -> Bastet : invitationGetMessage
+Bastet -> Server : send accept message
+Server -> Redis : store accept message
+Server -> Bastet : accept message ok
+Bastet -> User : msg sent
+@enduml 
\ No newline at end of file
diff --git a/server/router.go b/server/router.go
index 28c4e6e..ad290f5 100644
--- a/server/router.go
+++ b/server/router.go
@@ -141,17 +141,22 @@ func (r *RedisRouter) Route(msg *meowlib.ToServerMessage) (*meowlib.FromServerMe
 				from_server.Invitation.Payload = invitation // protobuf invitation
 			}
 
-			/* should not happen
-			case 3: // answer invitation
-				expiry := r.AnswerInvitation(msg.Invitation.Id, int(msg.Invitation.Timeout), msg.Invitation.Payload, r.InvitationTimeout)
-				from_server.Invitation.Expiry = expiry.UTC().Unix()
-			case 4: // get answer
-				answer, err := r.GetInvitationAnswer(msg.Invitation.Id)
-				if err != nil {
-					from_server.Invitation.Payload = []byte("invitation expired")
-				} else {
-					from_server.Invitation.Payload = answer
-				}
+		case 3: // answer invitation
+			// just propagate the source publickey
+			from_server.Invitation.From = msg.Invitation.From
+
+			//! store answer !!
+			from_server.Invitation.Payload = msg.Invitation.Payload
+			/*
+					expiry := r.AnswerInvitation(msg.Invitation.Id, int(msg.Invitation.Timeout), msg.Invitation.Payload, r.InvitationTimeout)
+					from_server.Invitation.Expiry = expiry.UTC().Unix()
+				case 4: // get answer
+					answer, err := r.GetInvitationAnswer(msg.Invitation.Id)
+					if err != nil {
+						from_server.Invitation.Payload = []byte("invitation expired")
+					} else {
+						from_server.Invitation.Payload = answer
+					}
 			*/
 		}
 	}