Incoming and Outgoing Letters Register for Factories

An incoming and outgoing letters register for a factory only works if every letter is logged against the order, customer or supplier it concerns, has one named owner and a response date, and is visible only to the people who need it. A paper logbook proves that a letter arrived; it does not tell you which order it affects or whose desk it is sitting on.

Picture a hypothetical machine shop. A supplier writes to say that the steel grade it promised for next month’s delivery is no longer available and proposes a substitute. Reception stamps the letter, writes it into the correspondence book and walks it to the purchasing office. The buyer is on leave. By the time anyone reads it, production has already planned the job around the original grade, and engineering learns about the substitution when the material shows up at goods receipt. It simply never became part of the order it was about.

This guide is about closing that gap: how a manufacturer can register incoming and outgoing correspondence so that every letter ends up with a clear outcome. If you want the broader picture of digitising office routines in general, read our article on office automation software. Here we stay on the shop floor side: letters that are tied to quotes, orders, purchases and deliveries.

Why factory correspondence gets lost in a paper mail log

In a typical office, a letter has one recipient and one reply. In a factory, a single customer letter can matter to sales, engineering and production planning at the same time. A handwritten mail register was never designed for that kind of routing. The usual failure points look like this:

• Letter numbers that mean nothing to the order file. The log says “letter 214 from Customer X”, but whoever opens the order has no idea letter 214 exists.
• Photocopies with no owner. To keep everyone informed, the letter is copied to three departments. Now there are three versions and nobody is sure who should act.
• No reply-by date. The register has no column for a deadline, or it has one that nobody reviews.
• Manual searching. When the plant manager asks “what exactly did the supplier say about the delay?”, someone has to leaf through the book and then dig through binders.
• Outgoing letters that never get logged. A buyer sends a commitment from their own laptop. Months later nobody can say what the company actually promised.

What kinds of letters does a manufacturer send and receive?

Before choosing any tool, list the correspondence your plant really handles. The table below is an example classification; yours will probably add a few rows.

In a make-to-order plant, most letters belong to an order, a customer or a supplier. It therefore makes sense to register them in the same place where those orders, customers and suppliers already live.

How to log incoming and outgoing letters: the fields that matter

A good register entry is short, but it never skips the essentials. Use this checklist to design your logging form or to audit the one you have:

1. Internal reference number and date, separate from the reference the sender printed on the letter.
2. Correspondent name, spelled exactly as in your customer or supplier master data, so it can be found later.
3. A subject that says something. Not “Further to our discussion”, but “Request to change material on part 4410, order 1187”.
4. Order or part number whenever the letter concerns a specific job.
5. One responsible person or role, never “all departments”.
6. A review or reply date, even for letters that need no written answer.
7. Visibility level: pricing and contract letters do not need to be open to everyone.
8. Reference to the previous letter, so a thread of correspondence stays intact.

Habit number four is the cheapest and the most powerful. Once the order number sits in the subject line, anyone following that order can also find the conversation around it. (All numbers above are invented examples.)

Standalone mail register software or a register inside your ERP?

Many plants run one program for correspondence and another for sales, purchasing and inventory. The practical differences show up quickly:

A standalone tool is fine for an organisation whose letters rarely touch operations. In a plant where correspondence is the tail of quotes, orders and purchases, keeping it apart means someone is always copying information between two places.

Who should see which letter? Roles for a correspondence archive

A digital archive is not just storage; it also decides who can open what. A few practical rules:

• The person running the register logs every letter but does not need to read the contents of sensitive finance letters.
• Each department sees the correspondence relevant to its work, for example purchasing sees supplier letters.
• Price and contract letters are limited to management and finance.
• The plant manager gets an overview of everything waiting for a reply without chasing people one by one.

These rules last only if they are defined by role rather than by person. When someone changes jobs, you change their role and their access follows.

Following up replies: approval inbox and overdue report

Logging is the easy part; follow-up is where registers fail. Two tools help. First, an inbox that shows each person the decisions waiting for them, each with its own deadline. If a customer letter triggers a change to an order, the approval of that change waits there instead of in someone’s memory. Second, an overdue-work report, so the weekly management meeting can ask “why are these three items past their date?” instead of “did anyone follow up?”.

For outgoing mail, set one simple rule: nothing leaves the plant in the company’s name unless it has a register number and the sender’s signature recorded on it.

The correspondence register in P-Soft Data

Data is P-Soft’s manufacturing ERP. It connects sales, engineering, purchasing, inventory, production, quality and finance, and it is installed on the factory’s own server, so letters and documents stay on your internal network and work continues even without internet access. Users open it in a browser on any computer or tablet. The relevant capabilities:

• Incoming and outgoing letters register (secretariat) alongside the customer, supplier and order records.
• Global search: type an order number, a customer’s name or a part and you land on the record the letter relates to.
• A unified approval inbox with a deadline per item, plus a dashboard for each role showing what waits for a decision.
• An overdue-work report to review everything past its date.
• Each user’s digital signature on documents, so it is clear who signed what.
• Separate roles and permissions per user: everyone sees only what they should.

If the correspondence register is a priority, start from the Pro plan; Start is designed to bring order to sales, purchasing and inventory first.

Setting up a factory mail register in six steps

1. Map your letter types using the table above, with an owning department for each.
2. Agree a subject-line convention: order number and correspondent name always included.
3. Define roles: register clerk, department staff, managers who need the overview.
4. Move your history: if your old letter list lives in a spreadsheet or a legacy tool, P-Soft’s team carries it over into Data, and the contract spells out how much is moved.
5. Set default review dates per letter type.
6. Review overdue items weekly until follow-up becomes a habit.

Customer letters often start at the quotation stage; the full path is described in from sales inquiry to order. To see how approvals and signatures are recorded in the same system, read our guide to digital signatures and the approval inbox.

Frequently Asked Questions

Which Data plan includes the incoming and outgoing letters register?

The register is part of the Pro and Elite plans. User digital signatures on documents are also available from Pro upwards.

Can I find all letters about one order by its number?

Global search works by order number, customer name or part, and the register sits in the same system. If you put the order number in each letter’s subject, the related correspondence is easy to reach.

Does every user see every letter?

No. Each user has their own role and permissions and sees only what their work requires.

We keep a list of old letters in Excel. Can it be moved?

Yes. Moving existing records out of spreadsheets or an older system is something P-Soft’s team handles; what exactly gets transferred is defined when you sign up and pick a plan.

Are letters stored in the cloud?

No. Data runs on your factory’s own server, keeps information on your internal network and can be used without an internet connection.

Want to see the letters register, approval inbox and global search working with orders like yours? Visit the Data manufacturing ERP page and request a walkthrough with the P-Soft team.

Further reading

• What Is ERP? Complete Guide to Enterprise Resource Planning
• ERP Software Guide: Benefits and How to Choose the Right System
• How to Choose the Right ERP Software for Your Organization

Complete guide: ERP software