Most Shopify store owners set up payment reminders once and then hope with great optimism that outstanding invoices will be paid from now on. However, there are a few things to keep in mind to ensure that the customer actually pays their outstanding invoice in the end.

In this article, you will find out which 12 points are the most important.

1. Use your own domain as the sender

The sender is one of the first things your customer sees. That's why your payment reminder should ideally be sent from your own shop domain.

When a customer receives an email from an unfamiliar or generic-looking sender address, uncertainty quickly arises. Trust is crucial, especially when it comes to payment requests. The customer must immediately recognize: This message actually comes from the shop where I ordered.

Having your own sender domain ensures recognition, looks more professional, and reduces the risk of the email being ignored or classified as suspicious.

2. Use transactional emails instead of marketing emails

Payment reminders should be treated as transactional emails, not marketing emails.

The difference is important: A payment reminder informs the customer about a specific, existing order and an outstanding payment. It is therefore directly linked to a purchase process. As such, it is not comparable to a newsletter or a promotional campaign.

Transactional emails generally have significantly better deliverability because they contain important information about an existing customer relationship. In addition, they cannot simply be unsubscribed from like classic marketing emails, as they are relevant for processing the order.

This is crucial for payment reminders: If the email does not land reliably in the inbox, it cannot trigger a payment either.

3. Adapt branding and content to your shop

A payment reminder must immediately look and sound like your shop. The logo, colors, tone, and content should match the brand.

If the email does not match your shop visually or linguistically, the customer may not recognize the message. This can lead to them ignoring it, deleting it, or, in the worst case, marking it as spam.

Consistency is particularly important for payment requests. The customer should not have to wonder if the message is genuine. They should immediately understand: This is my open order with this shop.

With Kindly, you can design your payment reminders so that they match your Shopify shop visually and in terms of content.

4. Write friendly but clearly

A good payment reminder should not sound aggressive. At the same time, it must not be phrased so softly that the actual action gets lost.

The customer should be politely reminded that their payment is still outstanding. At the same time, it must be clear what needs to be done now: pay, check payment information, or reply with questions.

With each subsequent reminder, the language can become a bit firmer. The first reminder can still be phrased very Core and helpfully. Later reminders can point out more clearly that the order remains unpaid and payment is required for it to be processed.

The right tone is important: professional, respectful, and unambiguous.

5. Use a natural subject line

The subject line plays a key role in whether your payment reminder is opened. It should be clear, natural, and not too long.

Avoid exaggerated phrasing, lots of special characters, or emojis. Especially when it comes to payment topics, this can quickly look unprofessional or make the email look unnecessarily like marketing.

A good subject line says directly what it is about. For example:

"Payment for your order is still outstanding"

or

"Reminder regarding your open order"

The customer should understand right in their inbox that it is about a specific order, without the subject sounding like advertising or pressure.

6. Schedule your reminder sequence with enough distance

Payment reminders should not follow too closely after one another. If a customer orders today and does not pay immediately, it does not automatically mean they have forgotten the payment.

With manual payment methods like bank transfer or prepayment, the customer often needs some time. Sometimes the payment is only made later in the day, the next morning, or after internal approval.

In many cases, an interval of about three days makes sense. This gives the customer enough time to complete the payment independently without feeling immediately pressured.

A sequence that is too aggressive can quickly have a negative impact. A well-timed reminder, on the other hand, comes across as helpful and professional.

7. Show directly which order it is about

The customer should immediately recognize in the email which order the payment reminder refers to.

A clear order summary directly in the email works best. This includes, for example, the order number, order date, products, total amount, and payment status.

A link to a PDF or an invoice can also be helpful. However, it should not be the only source of information. If the customer first has to click or open a document, additional friction is created.

The faster the customer understands what it is about, the higher the likelihood that they will complete the payment.

8. Do not use a no-reply address

Customers should be able to reply to payment reminders. A no-reply address is often counterproductive when it comes to outstanding payments.

If a customer has a question about the order, payment, invoice, or delivery time, they should be able to reply directly to the reminder. If they first have to look for another way to contact you, frustration arises — and the payment may be delayed further.

A reachable sender address builds trust and reduces unnecessary support hurdles.

Payment reminders are not just automated messages. They are also a point of contact between customer and shop.

9. Use SMS reminders if a phone number is available

Email is important, but not every customer reads every email immediately. If a phone number is available, SMS reminders can be a powerful addition.

SMS are often noticed more quickly than emails and are particularly well suited for short, clear reminders. Especially with outstanding payments, a short message can help draw the customer's attention back to the order.

Here too, it is important that the SMS is clear, professional, and not too intrusive. Ideally, it should refer to the open order and guide the customer directly to the payment information or the next step.

With Kindly, you can use SMS reminders in addition to email reminders, provided the customer's phone number is available.

10. Reduce any unnecessary friction

The simpler the next step is, the better.

The customer should not have to search for how to pay. Either the payment information is directly in the email, or the customer is guided to the payment instructions via a clear button.

Clarity is crucial, especially with manual payment methods. If bank details, reference, amount, or payment link are missing or hard to find, the likelihood increases that the customer will postpone the payment for later.

A good payment reminder therefore immediately answers the most important question:

What do I need to do now to pay for my order?

11. Never send reminders to customers who have already paid

One of the most important rules: Customers who have already paid should not receive any more payment reminders.

This looks unprofessional, causes confusion, and can damage trust in your shop. Therefore, just before sending any payment reminder, it should be checked whether the order has been paid in the meantime.

Kindly does this automatically. Before sending, it is checked whether the order is still marked as pending in Shopify or has already been paid. The reminder is only sent if the payment is still outstanding.

Anyone sending payment reminders manually can easily make mistakes here. Especially with bank transfers, the payment status in Shopify is often not automatically up to date.

Tip: With Cleero, the payment status can be updated automatically. Cleero connects to your bank account, detects matching incoming payments, assigns them to the corresponding Shopify orders, and then updates the payment status. This reduces the risk of customers being reminded by mistake.

12. Define permitted sending times

Not every time of day is suitable for payment reminders. In some countries, there are legal requirements or restrictions on when certain messages can be sent. Furthermore, it often looks unprofessional to customers when reminders arrive at unusual hours.

Weekends can also be problematic depending on the target group. For B2B customers, it is often useful to send reminders only on business days. For B2C shops, this may differ depending on the product and target group.

Permitted sending times help you appear more professional and send the reminder at a time when it is more likely to be noticed.

With Kindly, you can structure your reminder logic so that payment reminders are not simply sent blindly, but arrive at appropriate times for the customer.

Conclusion: Good payment reminders are no accident

A payment reminder is more than just a short message asking for payment. It is an important part of the customer experience and can determine whether an open order is paid or left unfinished.

The best payment reminders are trustworthy, clear, brand-consistent, and easy to implement. They immediately show the customer what it is about, what is outstanding, and what needs to be done next.

With Kindly, you can create exactly these kinds of payment reminders for Shopify: automated, professional, and tailored to your shop.

Because often it's not the big changes that make the difference. It's the small details that determine whether your payment reminder is ignored or paid.