---
title: FollowUpRequest Element Usage (R.310, R.323, R.324)
slug: eprescribing/guide/followuprequest-element-usage-r310-r323-r324
docTags: 
createdAt: 2026-07-09T21:08:14.089Z
---

# Overview

This section holds the application certification requirements located in the [FollowUpRequest Element Usage](docId\:hovvJDqKJ-XMO5y9Ld_nT) section in the guide.

## R.310

**R.310**: When responding to a FollowUpRequest, only one response shall be sent and shall reference the most recent request.

## R.323

**R.323**: Prescribing systems shall be able to identify and correctly interpret the FollowUpRequest field in inbound messages.

## R.324

**R.324**: When sending a follow up message for an outstanding request, the Pharmacy System shall populate and transmit the FollowUpRequest field.