diff --git a/code/game/objects/structures/crates_lockers/closets/secure/personal.dm b/code/game/objects/structures/crates_lockers/closets/secure/personal.dm
index 7270208d410..7cf47a65ec1 100644
--- a/code/game/objects/structures/crates_lockers/closets/secure/personal.dm
+++ b/code/game/objects/structures/crates_lockers/closets/secure/personal.dm
@@ -43,6 +43,10 @@
 		to_chat(user, "<span class='warning'>It appears to be broken.</span>")
 		return
 
+	if(istype(W, /obj/item/card/id/guest))
+		to_chat(user, "<span class='warning'>Invalid identification card.</span>")
+		return
+
 	var/obj/item/card/id/I = W
 	if(!I || !I.registered_name)
 		return
@@ -67,4 +71,4 @@
 			registered_name = I.registered_name
 			desc = "Owned by [I.registered_name]."
 	else
-		to_chat(user, "<span class='warning'>Access Denied</span>")
+		to_chat(user, "<span class='warning'>Access denied.</span>")