diff --git a/libcockatrice_protocol/libcockatrice/protocol/pb/moderator_commands.proto b/libcockatrice_protocol/libcockatrice/protocol/pb/moderator_commands.proto
index 5298d3dad..7963a97f2 100644
--- a/libcockatrice_protocol/libcockatrice/protocol/pb/moderator_commands.proto
+++ b/libcockatrice_protocol/libcockatrice/protocol/pb/moderator_commands.proto
@@ -165,6 +165,7 @@ message Command_GetUserAlts {
         optional Command_GetUserAlts ext = 1014;
     }
     optional string user_name = 1;
+    optional uint32 depth = 2 [default = 1]; // BFS depth: 1 = direct matches only, up to 3 for transitive alts-of-alts
 }
 
 message Command_GetModeratorLastLogins {
diff --git a/libcockatrice_protocol/libcockatrice/protocol/pb/serverinfo_user_alt.proto b/libcockatrice_protocol/libcockatrice/protocol/pb/serverinfo_user_alt.proto
index 191dd5063..ce5e4fce2 100644
--- a/libcockatrice_protocol/libcockatrice/protocol/pb/serverinfo_user_alt.proto
+++ b/libcockatrice_protocol/libcockatrice/protocol/pb/serverinfo_user_alt.proto
@@ -13,4 +13,8 @@ message ServerInfo_UserAlt {
     optional uint32 warn_count = 6;        // number of warnings on record
     optional uint32 ban_count = 7;         // number of bans on record
     optional bool is_active = 8;           // account is not deactivated/banned
+    optional string match_reason = 9; // why flagged, e.g. "email", "clientid:abc", "ip:1.2.3.4"; empty = seed/legacy
+    optional uint32 depth = 10;       // BFS distance from investigated account; 1 = direct, 2+ = alt-of-alt
+    optional uint32 shared_count =
+        11; // distinct users sharing the matched identifier; high values suggest VPN/shared network
 }