diff --git a/src/data/Thread.js b/src/data/Thread.js
index f4357eb..0304dcc 100644
--- a/src/data/Thread.js
+++ b/src/data/Thread.js
@@ -286,18 +286,22 @@ class Thread {
   /**
    * @param {Eris.MessageContent} content
    * @param {Eris.MessageFile} file
+   * @param {object} opts
+   * @param {boolean} opts.saveToLog
+   * @param {string} opts.logBody
    * @returns {Promise<void>}
    */
-  async postSystemMessage(content, file = null) {
+  async postSystemMessage(content, file = null, opts = {}) {
     const msg = await this._postToThreadChannel(content, file);
-    if (msg) {
+    if (msg && opts.saveToLog !== false) {
+      const finalLogBody = opts.logBody || msg.content || '<empty message>';
       await this._addThreadMessageToDB({
         message_type: THREAD_MESSAGE_TYPE.SYSTEM,
         user_id: null,
         user_name: '',
-        body: typeof content === 'string' ? content : content.content,
+        body: finalLogBody,
         is_anonymous: 0,
-        dm_message_id: msg.id
+        inbox_message_id: msg.id,
       });
     }
   }
@@ -305,18 +309,24 @@ class Thread {
   /**
    * @param {Eris.MessageContent} content
    * @param {Eris.MessageFile} file
+   * @param {object} opts
+   * @param {boolean} opts.saveToLog
+   * @param {string} opts.logBody
    * @returns {Promise<void>}
    */
-  async sendSystemMessageToUser(content, file = null) {
+  async sendSystemMessageToUser(content, file = null, opts = {}) {
     const msg = await this._sendDMToUser(content, file);
-    await this._addThreadMessageToDB({
-      message_type: THREAD_MESSAGE_TYPE.SYSTEM_TO_USER,
-      user_id: null,
-      user_name: '',
-      body: typeof content === 'string' ? content : content.content,
-      is_anonymous: 0,
-      dm_message_id: msg.id
-    });
+    if (opts.saveToLog !== false) {
+      const finalLogBody = opts.logBody || msg.content || '<empty message>';
+      await this._addThreadMessageToDB({
+        message_type: THREAD_MESSAGE_TYPE.SYSTEM_TO_USER,
+        user_id: null,
+        user_name: '',
+        body: finalLogBody,
+        is_anonymous: 0,
+        dm_message_id: msg.id,
+      });
+    }
   }
 
   /**
@@ -529,6 +539,56 @@ class Thread {
       });
   }
 
+  /**
+   * @param {Eris.Member} moderator
+   * @param {ThreadMessage} threadMessage
+   * @param {string} newText
+   * @param {object} opts
+   * @param {boolean} opts.quiet Whether to suppress edit notifications in the thread channel
+   * @returns {Promise<void>}
+   */
+  async editStaffReply(moderator, threadMessage, newText, opts = {}) {
+    const formattedThreadMessage = formatters.formatStaffReplyThreadMessage(
+      moderator,
+      newText,
+      threadMessage.message_number,
+      { isAnonymous: threadMessage.is_anonymous }
+    );
+
+    const formattedDM = formatters.formatStaffReplyDM(
+      moderator,
+      newText,
+      { isAnonymous: threadMessage.is_anonymous }
+    );
+
+    await bot.editMessage(threadMessage.dm_channel_id, threadMessage.dm_message_id, formattedDM);
+    await bot.editMessage(this.channel_id, threadMessage.inbox_message_id, formattedThreadMessage);
+
+    if (! opts.quiet) {
+      const threadNotification = formatters.formatStaffReplyEditNotificationThreadMessage(moderator, threadMessage, newText);
+      const logNotification = formatters.formatStaffReplyEditNotificationLogMessage(moderator, threadMessage, newText);
+      await this.postSystemMessage(threadNotification, null, { logBody: logNotification });
+    }
+  }
+
+  /**
+   * @param {Eris.Member} moderator
+   * @param {ThreadMessage} threadMessage
+   * @param {object} opts
+   * @param {boolean} opts.quiet Whether to suppress edit notifications in the thread channel
+   * @returns {Promise<void>}
+   */
+  async deleteStaffReply(moderator, threadMessage, opts = {}) {
+    await bot.deleteMessage(threadMessage.dm_channel_id, threadMessage.dm_message_id);
+    await bot.deleteMessage(this.channel_id, threadMessage.inbox_message_id);
+
+    if (! opts.quiet) {
+      const threadNotification = formatters.formatStaffReplyDeletionNotificationThreadMessage(moderator, threadMessage);
+      const logNotification = formatters.formatStaffReplyDeletionNotificationLogMessage(moderator, threadMessage);
+      await this.postSystemMessage(threadNotification, null, { logBody: logNotification });
+    }
+  }
+
   /**
    * @returns {Promise<String>}
    */
diff --git a/src/formatters.js b/src/formatters.js
index 04ed053..c3af718 100644
--- a/src/formatters.js
+++ b/src/formatters.js
@@ -1,6 +1,7 @@
 const Eris = require('eris');
 const utils = require('./utils');
 const config = require('./cfg');
+const ThreadMessage = require('./data/ThreadMessage');
 
 /**
  * Function to format the DM that is sent to the user when a staff member replies to them via !reply
@@ -49,6 +50,7 @@ const config = require('./cfg');
  */
 
 /**
+ * Function to format a user reply in a log
  * @callback FormatUserReplyLogMessage
  * @param {Eris.User} user
  * @param {Eris.Message} msg
@@ -58,6 +60,40 @@ const config = require('./cfg');
  * @return {string} Text to show in the log
  */
 
+/**
+ * Function to format the inbox channel notification for a staff reply edit
+ * @callback FormatStaffReplyEditNotificationThreadMessage
+ * @param {Eris.Member} moderator
+ * @param {ThreadMessage} threadMessage
+ * @param {string} newText
+ * @return {Eris.MessageContent} Message content to post in the thread channel
+ */
+
+/**
+ * Function to format the log notification for a staff reply edit
+ * @callback FormatStaffReplyEditNotificationLogMessage
+ * @param {Eris.Member} moderator
+ * @param {ThreadMessage} threadMessage
+ * @param {string} newText
+ * @return {string} Text to show in the log
+ */
+
+/**
+ * Function to format the inbox channel notification for a staff reply deletion
+ * @callback FormatStaffReplyDeletionNotificationThreadMessage
+ * @param {Eris.Member} moderator
+ * @param {ThreadMessage} threadMessage
+ * @return {Eris.MessageContent} Message content to post in the thread channel
+ */
+
+/**
+ * Function to format the log notification for a staff reply deletion
+ * @callback FormatStaffReplyDeletionNotificationLogMessage
+ * @param {Eris.Member} moderator
+ * @param {ThreadMessage} threadMessage
+ * @return {string} Text to show in the log
+ */
+
 /**
  * @typedef MessageFormatters
  * @property {FormatStaffReplyDM} formatStaffReplyDM
@@ -65,6 +101,10 @@ const config = require('./cfg');
  * @property {FormatStaffReplyLogMessage} formatStaffReplyLogMessage
  * @property {FormatUserReplyThreadMessage} formatUserReplyThreadMessage
  * @property {FormatUserReplyLogMessage} formatUserReplyLogMessage
+ * @property {FormatStaffReplyEditNotificationThreadMessage} formatStaffReplyEditNotificationThreadMessage
+ * @property {FormatStaffReplyEditNotificationLogMessage} formatStaffReplyEditNotificationLogMessage
+ * @property {FormatStaffReplyDeletionNotificationThreadMessage} formatStaffReplyDeletionNotificationThreadMessage
+ * @property {FormatStaffReplyDeletionNotificationLogMessage} formatStaffReplyDeletionNotificationLogMessage
  */
 
 /**
@@ -156,6 +196,32 @@ const defaultFormatters = {
 
     return result;
   },
+
+  formatStaffReplyEditNotificationThreadMessage(moderator, threadMessage, newText) {
+    let content = `**${moderator.user.username}#${moderator.user.discriminator} (\`${moderator.id}\`) edited reply \`[${threadMessage.message_number}]\`:**`;
+    content += `\n\`B:\` ${threadMessage.body}`;
+    content += `\n\`A:\` ${newText}`;
+    return utils.disableLinkPreviews(content);
+  },
+
+  formatStaffReplyEditNotificationLogMessage(moderator, threadMessage, newText) {
+    let content = `${moderator.user.username}#${moderator.user.discriminator} (${moderator.id}) edited reply [${threadMessage.message_number}]:`;
+    content += `\nB: ${threadMessage.body}`;
+    content += `\nA: ${newText}`;
+    return content;
+  },
+
+  formatStaffReplyDeletionNotificationThreadMessage(moderator, threadMessage) {
+    let content = `**${moderator.user.username}#${moderator.user.discriminator} (\`${moderator.id}\`) deleted reply \`[${threadMessage.message_number}]\`:**`;
+    content += `\n\`B:\` ${threadMessage.body}`;
+    return utils.disableLinkPreviews(content);
+  },
+
+  formatStaffReplyDeletionNotificationLogMessage(moderator, threadMessage) {
+    let content = `${moderator.user.username}#${moderator.user.discriminator} (${moderator.id}) deleted reply [${threadMessage.message_number}]:`;
+    content += `\nB: ${threadMessage.body}`;
+    return content;
+  },
 };
 
 /**
@@ -205,4 +271,36 @@ module.exports = {
   setUserReplyLogMessageFormatter(fn) {
     formatters.formatUserReplyLogMessage = fn;
   },
+
+  /**
+   * @param {FormatStaffReplyEditNotificationThreadMessage} fn
+   * @return {void}
+   */
+  setStaffReplyEditNotificationThreadMessageFormatter(fn) {
+    formatters.formatStaffReplyEditNotificationThreadMessage = fn;
+  },
+
+  /**
+   * @param {FormatStaffReplyEditNotificationLogMessage} fn
+   * @return {void}
+   */
+  setStaffReplyEditNotificationLogMessageFormatter(fn) {
+    formatters.formatStaffReplyEditNotificationLogMessage = fn;
+  },
+
+  /**
+   * @param {FormatStaffReplyDeletionNotificationThreadMessage} fn
+   * @return {void}
+   */
+  setStaffReplyDeletionNotificationThreadMessageFormatter(fn) {
+    formatters.formatStaffReplyDeletionNotificationThreadMessage = fn;
+  },
+
+  /**
+   * @param {FormatStaffReplyDeletionNotificationLogMessage} fn
+   * @return {void}
+   */
+  setStaffReplyDeletionNotificationLogMessageFormatter(fn) {
+    formatters.formatStaffReplyDeletionNotificationLogMessage = fn;
+  },
 };