---
title: Message Format (S.200, S.201)
slug: eprescribing/guide/message-format-s200-s201
docTags: 
createdAt: 2026-07-09T19:47:09.705Z
---

# Overview

This section holds the application certification requirements located in the [Message Format](docId\:KsEmmwLDJD0i9JicT7JTP) section in the guide.

## S.200

**S.200:** Customers shall be able to receive syntactically valid maximum and minimum populated messages. Optional data elements (and values therein) shall not cause message failure.

## S.201

**S.201:** Customers shall ensure all messages are syntactically correct before transmission to Surescripts.