Payment Link

A payment link is a unique web address, single-use (or reusable), that a business generates so a customer can complete an online payment. When they click it, the person lands on a checkout page hosted by a payment provider, where they enter their card details, choose a bank transfer or pay with a digital wallet. There is no need for a physical terminal (POS), an e-commerce site or for the merchant to handle sensitive card data.

The beauty of a payment link is that it turns any conversation channel into a point of payment: you paste it into a WhatsApp chat, an email, an Instagram story or an invoice. That is why it is the piece that closes the loop of conversational commerce: the sales rep answers questions in the chat and, in the same thread, sends the link to collect payment. In a sales operation connected to a CRM, generating and sending that link from the customer's own record is part of what Sellium orchestrates, so the payment is logged alongside the opportunity instead of getting lost in a stray conversation.

Unlike a full checkout integration, a payment link requires no development: you create it in minutes from the provider's dashboard or via API, setting the amount, the description and, optionally, an expiration date. That makes it ideal for remote sales, collecting payments at a distance and businesses that do not have an online store yet.

How a payment link works, step by step

The flow is simple, and that is why it scales well. First, the merchant generates the link from its payment provider's dashboard or through a call to its API, specifying the amount, a description of the product or service and, if desired, an expiration date or a usage limit. The provider returns a short, unique URL. Second, that link is shared through the channel the customer already uses: WhatsApp, email, SMS or social media. Third, the customer clicks and lands on a checkout page hosted and certified by the provider, where they choose the payment method. Fourth, the money is credited to the merchant's account and the provider reports the result, usually through a webhook that tells the company's systems whether the payment was approved, declined or left pending.

The key detail is security: because the payment screen lives on the provider's infrastructure, card data never passes through the merchant's servers. That drastically reduces the scope of PCI DSS compliance requirements and shifts the burden of fraud prevention and encryption to the payments specialist.

Why it matters for a business

The payment link solves a very specific problem in Latin America: a huge share of sales starts in a conversation (a WhatsApp message, an Instagram inquiry), and many companies do not have an online store where they can close them. Without a way to collect payment, the sale goes cold while the customer "thinks it over." The link shrinks the distance between yes and payment to a single click, which improves the conversion rate and cuts friction right at the moment of highest purchase intent.

It also makes it possible to collect from customers in another city or country without being there in person, and it gives sales teams a tool to close remote deals as quickly as they would at a counter.

A concrete example in Argentina

Picture a wholesale distributor in Córdoba that sells parts to repair shops in the provinces. A buyer writes on WhatsApp asking for three parts. The sales rep puts together the quote, confirms stock and, instead of dictating a CBU (bank account number) and waiting for the transfer receipt (with the risk of errors and delays), pastes a payment link for the total. The shop pays by card in installments from a phone, the provider confirms the funds in seconds and the system marks the order as paid. What used to be a day of back-and-forth closes in minutes, and there is a record of who paid, when and for what.

Common mistakes when using payment links

• Not setting an expiration date or usage limit: a generic, reusable link circulating without control can lead to duplicate charges or confusion about which payment belongs to which customer.
• Not reconciling the payment with the order: if the provider's notification is not automatically matched to the order, the team ends up checking by hand what was paid, which wipes out much of the time saved.
• Sending the link without context: a message with nothing but a URL raises suspicion of fraud. It is best to include the description, the amount and the merchant's name.
• Ignoring the mobile experience: most people pay from their phones, so a slow or confusing checkout page drags conversion down.

How it differs from a payment gateway and a checkout

These three concepts are often confused, but they play different roles. The payment link is the lightest way to get paid online; the payment gateway is the underlying technology that processes the transaction; and the checkout is the payment experience built into your own online store.

In practice, a payment link runs on a payment gateway under the hood: it is the simplest presentation layer that engine can offer. And while the checkout serves a store with a shopping cart flow, the link shines when the sale is one-to-one and starts with a conversation. Many companies start with payment links to validate the channel and then, as volume grows, add an integrated checkout, without giving up the link for exceptional or remote payments.