diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1111c19..3e4aa32 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,14 @@
+## Unreleased
+
+### Added
+
+* `ImmersClient.removeAvatar` - new high-level api to remove models from user's Avatar collection
+* `Activities.remove` - new low-level api to remove activities
+
+### Fixed
+
+* `Activities.add` - fixed target URL logic
+
 ## v2.9.0 (2022-10-05) 
 
 ### Added
diff --git a/source/activities.js b/source/activities.js
index 4edae24..1add141 100644
--- a/source/activities.js
+++ b/source/activities.js
@@ -238,7 +238,7 @@ export class Activities {
       object: typeof activity === 'string' ? activity : activity.id,
       target: target.startsWith('https://')
         ? target
-        : `https://${this.homeImmer}/collection/${this.actor.preferredUsername}/${target}`
+        : `https://${getURLPart(this.homeImmer, 'host')})/collection/${this.actor.preferredUsername}/${target}`
     })
   }
 
@@ -385,6 +385,17 @@ export class Activities {
     })
   }
 
+  remove (activity, target) {
+    return this.postActivity({
+      type: 'Remove',
+      actor: this.actor.id,
+      object: typeof activity === 'string' ? activity : activity.id,
+      target: target.startsWith('https://')
+        ? target
+        : `https://${getURLPart(this.homeImmer, 'host')})/collection/${this.actor.preferredUsername}/${target}`
+    })
+  }
+
   undo (activity) {
     return this.postActivity({
       type: 'Undo',
diff --git a/source/client.js b/source/client.js
index 7689133..e3b343c 100644
--- a/source/client.js
+++ b/source/client.js
@@ -397,10 +397,10 @@ export class ImmersClient extends window.EventTarget {
 
   /**
    * Send a message with text content.
-   * Privacy level determines who receives and can acccess the message.
-   * Direct: Only those named in `to` receive the message.
-   * Friends: Direct plus friends list.
-   * Public: Direct plus Friends plus accessible via URL for sharing.
+   * privacy level determines who receives and can acccess the message.
+   * direct: Only those named in `to` receive the message.
+   * friends: Direct plus friends list.
+   * public: Direct plus Friends plus accessible via URL for sharing.
    * @param {string} content - The text/HTML content. Will be sanitized before sending
    * @param {string} privacy - 'direct', 'friends', or 'public'
    * @param {string[]} [to] - Addressees. Accepts Immers handles (username[domain.name]) and ActivityPub IRIs
@@ -573,6 +573,15 @@ export class ImmersClient extends window.EventTarget {
     return this.activities.updateProfile(profileUpdate)
   }
 
+  /**
+   * Remove user's avatar from their Avatar Collection.
+   * @param  {(string|Activities.APActivity)} sourceActivity - Activity IRI or Activity from the Avatars Collection to remove
+   * @returns {Promise<string>} IRI of the remove activity
+   */
+  async removeAvatar (sourceActivity) {
+    return this.activities.remove(sourceActivity, this.profile.collections.avatars)
+  }
+
   // Misc utilities
   /**
    * Attempt to fetch a cross-domain resource.