How to inform a customer about a delivery delay, with examples

To inform a customer about a delivery delay, send a short message with three parts in a fixed order: we know about the delay, here is your new date, here is what we are doing about it. Before they ask, always. That structure is the whole craft, and the templates below are variations of it by scenario. It sits inside the broader job of customer order tracking: telling the shopper where their order is, especially when the answer is bad. The part that still surprises me is that it is not the delay that kills the relationship with a shopper, it is the silence. The words are the easy half. Every order is a promise. Keeyu keeps it, and a delay message is a promise being renegotiated in public. The hard half is seeing the delay and acting on it before the shopper ever has to ask, and that is an operations job, the one proactive e-commerce operations exists to do.

Template 1: pre-shipment delay

For the order that has not left the building: stock shortfall, warehouse backlog, allocation failure.

Subject: Your order is delayed. New ship date inside.

Hi {first name}, your order {number} was due to ship {original date} and it has not left us yet. The new ship date is {new date}, arriving by {new delivery date}. The delay is on our side: {one honest sentence, e.g. "the {item} sold faster than our stock could follow"}. We have moved your order to express shipping at no cost to make up the time. If the new date does not work, reply to this email and we will sort a refund or a swap, no questions. {Name}, {Brand}

Worth knowing what share of your inbox this template is really covering. About half of all tickets are some version of where is my order, a figure I gave on The Breakout CEO. And those are only the shoppers who ask. When an order misses its promise there are two paths: the shopper who writes in and becomes a help desk ticket, and the shopper who says nothing, is still upset, and just leaves. A delay message sent first reaches both of them.

The cost of waiting for the question is real. In the 786 pain points mined from 270 customer call transcripts between May 2025 and May 2026, where is my order and delivery delays were the biggest customer-driven ticket category, and at one brand a single agent spent 15 to 19 hours a month on manual outreach for orders marked fulfilled that never arrived. Losing someone because they had to chase their order is like setting fire to $80 every time a parcel is late.

Template 2: in-transit carrier delay

For the parcel that shipped and stalled.

Subject: Your delivery is running late. Here is the new date.

Hi {first name}, your order {number} shipped on time but has slowed in the carrier network. Tracking now shows arrival by {new date}. We are monitoring it hourly, and if it has not moved by {threshold date}, we will ship a replacement on express automatically. You do not need to do anything. Track it here: {link}. {Name}, {Brand}

If we can fix a stalled parcel without the shopper knowing, they never know. When we cannot, we engage with them first and positively, with the fix already in motion, so it never becomes a reactive ticket and the team is never on the back foot.

Template 3: bulk delay, peak season or operational incident

For the day something breaks across many orders at once, the scenario the cost of waiting for complaints page prices out. This one exists because of P.E. Nation in 2020: COVID pushed our warehouse sale online, demand crashed the website, the site stopped syncing with the warehouse, and a thousand customers bought products that did not exist. Our customer service team did not know until shoppers called asking where their orders were. Tracy, who ran customer service and is now my co-founder, had to double her team and spend two weeks calling customers to say sorry, pass on credits and give money back. One proactive message to every affected shopper, sent the same day, is the difference between an incident and two weeks on the phone.

Subject: An update on your {Brand} order

Hi {first name}, we oversold during {event} and your order {number} is affected: {specific impact for this customer}. Here is what we are doing: {remedy: refund processed today / replacement shipping {date} / your choice of the two, one click below}. You will not need to chase us. We will update you again by {date} regardless. We are sorry, and we would rather tell you now than have you find out at your door. {Name}, {Brand}

One legal note worth knowing before you write any of these: under the FTC's Mail, Internet, or Telephone Order Merchandise Rule, a US seller who cannot ship within the promised time owes the buyer a revised date and the option to cancel. The template below is the good-practice version of an obligation you already have.

The version of this that lands best is the one where the fix ships with the message. When we spot an order that has stopped moving long enough to be lost, the shopper gets the replacement, the express upgrade and the new tracking number in the same email as the apology, which is the sequence I walked through on Add To Cart. A delay message with no action attached asks the shopper to keep worrying, politely.

Tone rules, learned the expensive way

• Advance notice changes the relationship. No one likes missing out on getting what they paid for on time as promised, but customers genuinely appreciate being advised in advance, and it changes the whole relationship.
• Specific beats sorry. One brief apology, then dates and actions. Certainty is the product of this email.
• Never make the carrier the whole answer. The customer bought from you, not the carrier. "It shipped on time" is context, not absolution.
• Give a remedy proportional to the delay. Express upgrade, a credit, or the choice of a refund. An empty apology on a material delay reads as indifference.
• Commit to the next update. "We will update you by Thursday regardless" kills the follow-up ticket before it exists.

The same three-part structure works on the reverse leg for a slow refund, covered on the instant refunds page.

The template is the last step, not the first

Every template above assumes you knew about the delay in time to send it. A lot of brands are happy being reactive: they wait for the shopper to say they have a problem, then measure the team on how fast it closes that ticket. That is measuring a problem nobody wanted. The detection has to come first: watching every order against the delivery promise it was sold with, catching the drift while there is still time to act. That is what Keeyu does, and the sending is the easy end of it: detect the stalled order, fix what can be fixed, then fire the message, personalized, at scale, automatically. The EHP Labs team describes the before picture in our customer story: always on the back foot, not recognizing a problem until a customer pointed it out, and at times without clear communication because they were waiting to see what had happened. That wait is the delay message that never gets sent. Detect. Decide. Act. Then tell. Keeyu gets shoppers what they want, on time, as promised, and when it truly cannot, the customer hears it from you first. The full milestone playbook is on the shipping notifications page, the metrics on the on-time delivery page, the discipline on the post-purchase operations hub. Every order is a promise. Keeyu keeps it, and these templates are for the days it needs help.

Before you write anything, ask what would have to be true for the message never to be needed. A parcel that has not left the warehouse can be pushed out, a failed payment can be retried, an out-of-stock line can go to back order with the shopper told what happens next, and I described that set on Add To Cart. Those three cover most of the delay emails a team writes in a week.

• Keeyu customer results (EHP Labs): keeyu.com/customer-stories
• The Breakout CEO #86, The Pivot This Founder Made After an Investor Called It Impossible - one in five US shoppers not getting orders on time, and the ticket ratios behind it.
• Add To Cart #599, How to Prevent "Where is my Order?" Complaints Before Customers Ask - preventing "where is my order" before the customer asks.
• Marketing for SMEs, Jevon Le Roux on the E-Commerce Mistake Costing Millions - the orchestration layer, and the 55% ticket cut at EHP Labs.
• Federal Trade Commission, 16 CFR 435.2, Mail, Internet, or Telephone Order Merchandise Rule - a seller who cannot ship within the promised time must offer the buyer a revised shipping date and the option to cancel for a prompt refund.