A Guide to Effective Delivery Management for Marketplace Sellers

At Whistl Parcels, the UK’s leading parcel delivery management company, we help marketplace sellers save time and money, improve seller feedback and scale their UK and cross-border sales through bespoke delivery management and tailored fulfilment solutions.

In this guide, we explore the current UK marketplace landscape, the key sales channels available to sellers, and the delivery requirements you need to meet to maximise marketplace performance.

We also explain what delivery management is, why it matters, and the key considerations when building an effective marketplace delivery strategy.

What is the marketplace landscape in the UK?

The UK is the most advanced eCommerce market in Europe, generating around £0.7 trillion in annual sales and accounting for nearly 30% of all retail sales. With approximately 190,000 businesses registered on eBay UK and more than 280,000 Amazon sellers, marketplace sellers make up a significant proportion of the UK’s 580,000 eCommerce-enabled businesses.

While Amazon and eBay continue to dominate the UK marketplace landscape, platforms such as Etsy, Wayfair and OnBuy are growing in popularity and relevance.

For eCommerce merchants seeking rapid brand exposure and scalability, Amazon and eBay remain the priority marketplaces due to their reach and established infrastructure. However, specialist platforms such as Etsy, notonthehighstreet, and home-grown marketplaces like OnBuy present valuable opportunities for multi-channel retailers to diversify risk, reach niche audiences and complement their core sales channels.

What are Amazon’s delivery requirements?

When selling on Amazon, you have two fulfilment options:

• Fulfilment by Amazon (FBA)

• Fulfilment by Merchant (FBM)

While FBM offers greater control and potentially lower selling fees, FBA provides access to Amazon Prime customers and improves your chances of winning the Buy Box.

If you choose to sell via FBM in the UK, Amazon requires sellers to ship orders using approved parcel carriers. This ensures Amazon can protect its brand reputation and maintain a consistent customer experience.

Amazon currently works with a carefully selected network of integrated carrier partners, including:

• Amazon Shipping

• APC

• ArrowXL

• DHL Parcel UK

• DPD

• DX Freight

• GLS

• Hermes

• Parcelforce

• Royal Mail

• TNT

• UPS

• Yodel

• Whistl

The Whistl Group has recently been added to Amazon’s list of integrated carriers. This integration improves end-to-end tracking visibility, helping sellers reduce buyer contacts, minimise order defects and lost order costs, and protect themselves from A-to-Z Guarantee claims.

What are eBay’s delivery requirements?

Unlike Amazon, eBay allows sellers to ship with any carrier, provided the delivery service matches what is stated in the listing.

However, eBay protects its customers through Buyer Protection, ensuring that if something goes wrong during picking, packing or delivery, the buyer receives the item or a full refund, including postage.

For sellers, this means working with trusted delivery partners that can offer the right balance of speed, reliability, tracking visibility, in-flight delivery options and insurance coverage—all of which directly impact seller ratings and customer satisfaction.

What is eBay’s Global Shipping Programme?

Often seen as eBay’s alternative to Amazon FBA, eBay’s Global Shipping Programme (GSP) is designed to simplify international shipping for sellers.

With GSP, you ship your order to a UK-based warehouse, and eBay manages the onward international delivery. The key benefits include increased visibility in international markets and reduced complexity for sellers. However, the programme also comes with strict size, weight and value restrictions, which may limit suitability for some product ranges.

The benefits of working with a marketplace delivery management company

For retailers looking to grow international marketplace sales, partnering with a cross-border shipping specialist can be a highly effective approach.

Wherever your customers are based, Whistl Parcels helps you reach them through dedicated global shipping solutions. Our international courier services provide greater choice and flexibility for both import and export, while maintaining the service levels marketplaces and consumers expect.

How to formulate an effective marketplace delivery strategy

Marketplace sales often play a critical role in wider eCommerce growth objectives. To succeed, your delivery performance must meet customer expectations while remaining compliant with each marketplace’s guidelines.

We recommend the following tactics to optimise your marketplace delivery strategy:

• Map your product range and customer profiles, segmenting by product type and buyer preference. For example, bespoke or handmade products may be better suited to Etsy, while FMCG performs well on mainstream marketplaces.

• Analyse which marketplaces best align with your product range and growth objectives.

• Understand each marketplace’s delivery requirements before launching.

• Adopt a hybrid fulfilment model where appropriate—fulfilling some orders in-house (e.g. FBM or traditional eBay selling) supported by a carrier management partner, while also using third-party fulfilment or marketplace fulfilment services such as FBA or eBay GSP.

• Monitor delivery performance using proactive technology to identify issues early.

• Reduce “Where Is My Order?” (WISMO) queries by redeploying resources and implementing reactive customer communication.

• Continuously analyse delivery-related feedback and seller metrics to drive ongoing improvement.

How Whistl Parcels can support your marketplace delivery and fulfilment

Marketplace selling is a vital part of any successful multi-channel retail strategy—and delivery consistency and reliability are critical to long-term success.

At Whistl Parcels, we understand that future sales are closely linked to the performance of your delivery strategy and the reputation of your brand.

Our specialist Amazon and eBay parcel delivery services are designed to handle high volumes efficiently, allowing us to scale with your business and support you during peak periods, promotions and seasonal demand.