diff --git a/src/pcd.rs b/src/pcd.rs
index 49915f8..b99e258 100644
--- a/src/pcd.rs
+++ b/src/pcd.rs
@@ -3,6 +3,7 @@ use rs_merkle::{algorithms::Sha256, MerkleTree};
 use serde::ser::SerializeStruct;
 use std::collections::{HashMap, HashSet};
 use std::hash::{Hash as StdHash, Hasher};
+use std::fmt;
 
 use aes_gcm::{
     aead::{Aead, Payload},
@@ -30,6 +31,12 @@ pub struct Member {
     sp_addresses: Vec<String>,
 }
 
+impl fmt::Display for Member {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{}", self.sp_addresses.join(","))
+    }
+}
+
 impl Serialize for Member {
     fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
     where