diff --git a/.changeset/wild-pianos-join.md b/.changeset/wild-pianos-join.md
deleted file mode 100644
index 202bbe8a67..0000000000
--- a/.changeset/wild-pianos-join.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-"better-auth": patch
----
-
-fix(username): `isUsernameAvailable` should run validation
diff --git a/packages/better-auth/src/plugins/username/index.ts b/packages/better-auth/src/plugins/username/index.ts
index e7df89136d..3dfd0c5359 100644
--- a/packages/better-auth/src/plugins/username/index.ts
+++ b/packages/better-auth/src/plugins/username/index.ts
@@ -268,30 +268,6 @@ export const username = (options?: UsernameOptions) => {
 							message: ERROR_CODES.INVALID_USERNAME,
 						});
 					}
-					const minUsernameLength = options?.minUsernameLength || 3;
-					const maxUsernameLength = options?.maxUsernameLength || 30;
-					if (username.length < minUsernameLength) {
-						throw new APIError("UNPROCESSABLE_ENTITY", {
-							message: ERROR_CODES.USERNAME_TOO_SHORT,
-						});
-					}
-
-					if (username.length > maxUsernameLength) {
-						throw new APIError("UNPROCESSABLE_ENTITY", {
-							message: ERROR_CODES.USERNAME_TOO_LONG,
-						});
-					}
-
-					const validator =
-						options?.usernameValidator || defaultUsernameValidator;
-
-					const valid = await validator(username);
-					if (!valid) {
-						throw new APIError("UNPROCESSABLE_ENTITY", {
-							message: ERROR_CODES.INVALID_USERNAME,
-						});
-					}
-
 					const user = await ctx.context.adapter.findOne<User>({
 						model: "user",
 						where: [