By Kate Lester, Co-founder and CEO, Diamond Logistics Ltd

For many ecommerce brands, fulfilment is something that only gets serious attention once it starts to go wrong.

Missed or incomplete deliveries, rising costs and customer complaints often appear long before fulfilment is recognised as a strategic issue. After working with thousands of ecommerce businesses over three decades, we see the same fulfilment mistakes repeated time and again—often by otherwise well‑run, fast‑growing brands.

Mistake 1: Treating fulfilment as an afterthought

Many brands invest heavily in product development, marketing and customer acquisition, only to ‘figure out logistics later’. Fulfilment is expected to catch up but in reality, fulfilment should be the bedrock – shaping decisions around pricing, margins, product design and customer promises from day one. When it doesn’t, brands are forced into reactive, expensive fixes that limit growth.

Build fulfilment into your business model early. Understand how weight, dimensions, delivery speed and returns affect your margins before scale magnifies the problem.

Mistake 2: Assuming in‑house fulfilment is cheaper

Running fulfilment internally often feels like control but it can quietly erode efficiency and crucially profitability. Rent and business rate hikes, utility bills increasing, staffing costs, systems, carrier contracts and peak period pressures are frequently underestimated. We regularly see businesses with relatively modest order volumes maintaining their own warehouses when shared, outsourced fulfilment would be significantly more cost‑effective.

A better approach would be to compare total operational cost, not just rent. Outsourced fulfilment spreads infrastructure, technology and labour across multiple clients—something individual brands rarely achieve efficiently on their own.

Mistake 3: Relying on a single carrier or single fulfilment site

Fulfilment is definitely not a one size fits all scenario. Single‑carrier and single‑site models create hidden risk.  When capacity tightens, service levels drop or regional issues arise, brands have few options. Resilience matters as much as efficiency.

Multi‑carrier routing and distributed fulfilment reduce dependency on any one provider or location. Platforms like Despatchlab automatically select the most appropriate carrier and route based on destination, service level and shipment profile.

Mistake 4: Lack of real‑time visibility

Many brands only discover fulfilment issues when customers complain. Carrier portals, delayed reporting and fragmented systems make it difficult to see problems early – or act on them.

Using systems that normalise tracking data across carriers and highlight exceptions proactively provides huge value add for any business. Visibility isn’t about dashboards for their own sake; it is about managing expectations and preventing customer dissatisfaction before it happens.

Mistake 5: Optimising for cost at the expense of experience

Cheapest delivery is rarely the best delivery. Slow, unreliable or poorly communicated fulfilment damages repeat purchase rates and brand trust.

Always optimise customer experience first, cost second. Fulfilment is part of your brand, whether you manage it yourself or outsource it.

The takeaway? Most fulfilment failures are not caused by lack of effort – they are caused by the wrong assumptions. Technology‑enabled, outsourced fulfilment does not remove control; it enables it, allowing brands to focus on growth rather than firefighting.