diff --git a/database/entities/Like.ts b/database/entities/Like.ts
index 70ecc929..6d1af5c9 100644
--- a/database/entities/Like.ts
+++ b/database/entities/Like.ts
@@ -46,3 +46,30 @@ export const createLike = async (
 		// TODO: Add database jobs for federating this
 	}
 };
+
+export const deleteLike = async (
+	user: UserWithRelations,
+	status: StatusWithRelations
+) => {
+	await client.like.deleteMany({
+		where: {
+			likedId: status.id,
+			likerId: user.id,
+		},
+	});
+
+	// Notify the user that their post has been favourited
+	await client.notification.deleteMany({
+		where: {
+			accountId: user.id,
+			type: "favourite",
+			notifiedId: status.authorId,
+			statusId: status.id,
+		},
+	});
+
+	if (user.instanceId === null) {
+		// User is local, federate the delete
+		// TODO: Federate this
+	}
+};
diff --git a/server/api/api/v1/statuses/[id]/unfavourite.ts b/server/api/api/v1/statuses/[id]/unfavourite.ts
index d893901a..36de4fe2 100644
--- a/server/api/api/v1/statuses/[id]/unfavourite.ts
+++ b/server/api/api/v1/statuses/[id]/unfavourite.ts
@@ -3,6 +3,7 @@ import { applyConfig } from "@api";
 import { errorResponse, jsonResponse } from "@response";
 import type { MatchedRoute } from "bun";
 import { client } from "~database/datasource";
+import { deleteLike } from "~database/entities/Like";
 import {
 	isViewableByUser,
 	statusAndUserRelations,
@@ -46,12 +47,7 @@ export default async (
 	if (!status || !isViewableByUser(status, user))
 		return errorResponse("Record not found", 404);
 
-	await client.like.deleteMany({
-		where: {
-			likedId: status.id,
-			likerId: user.id,
-		},
-	});
+	await deleteLike(user, status);
 
 	return jsonResponse({
 		...(await statusToAPI(status, user)),
diff --git a/server/api/users/[uuid]/inbox/index.ts b/server/api/users/[uuid]/inbox/index.ts
index 8903d522..f749908d 100644
--- a/server/api/users/[uuid]/inbox/index.ts
+++ b/server/api/users/[uuid]/inbox/index.ts
@@ -7,7 +7,7 @@ import { errorResponse, jsonResponse } from "@response";
 import type { MatchedRoute } from "bun";
 import { client } from "~database/datasource";
 import { parseEmojis } from "~database/entities/Emoji";
-import { createLike } from "~database/entities/Like";
+import { createLike, deleteLike } from "~database/entities/Like";
 import { createFromObject } from "~database/entities/Object";
 import {
 	createNewStatus,
@@ -21,6 +21,7 @@ import type {
 	LysandAction,
 	LysandPublication,
 	Patch,
+	Undo,
 } from "~types/lysand/Object";
 
 export const meta = applyConfig({
@@ -274,6 +275,10 @@ export default async (
 		case "Dislike": {
 			// Store the object in the LysandObject table
 			await createFromObject(body);
+
+			return jsonResponse({
+				info: "Dislikes are not supported by this software",
+			});
 			break;
 		}
 		case "Follow": {
@@ -332,8 +337,61 @@ export default async (
 			break;
 		}
 		case "Undo": {
+			const undo = body as Undo;
 			// Store the object in the LysandObject table
 			await createFromObject(body);
+
+			const object = await client.lysandObject.findUnique({
+				where: {
+					uri: undo.object,
+				},
+			});
+
+			if (!object) {
+				return errorResponse("Object not found", 404);
+			}
+
+			switch (object.type) {
+				case "Like": {
+					const status = await client.status.findUnique({
+						where: {
+							uri: undo.object,
+							authorId: author.id,
+						},
+						include: statusAndUserRelations,
+					});
+
+					if (!status) {
+						return errorResponse("Status not found", 404);
+					}
+
+					await deleteLike(author, status);
+					break;
+				}
+				case "Announce": {
+					await client.status.delete({
+						where: {
+							uri: undo.object,
+							authorId: author.id,
+						},
+						include: statusAndUserRelations,
+					});
+					break;
+				}
+				case "Note": {
+					await client.status.delete({
+						where: {
+							uri: undo.object,
+							authorId: author.id,
+						},
+						include: statusAndUserRelations,
+					});
+					break;
+				}
+				default: {
+					return errorResponse("Invalid object type", 400);
+				}
+			}
 			break;
 		}
 		case "Extension": {