How a Marketing Agency Accepted $680K in USDT Without Integration

13/10/2026

Last updated: October 13, 2026 · 4 min read

One European marketing agency had never handled crypto payments until one of its largest clients asked to pay that way instead of using the conventional payment method. The agency needed a way to accommodate the request without building a new payment flow. With PassimPay, it started issuing invoices without integration, while the client’s latest four monthly payments increased from approximately $300K to approximately $680K.

Key Results

~$300K → ~$680K — Monthly payment more than doubled over the last four payments
0 integrations — Invoicing started right after one onboarding call
USDT (TRC20) — Payments received since December 2025

Challenge

Before this request, the agency had no experience with cryptocurrency payments and had not received similar requests from other clients. Then one of its largest clients said it wanted to pay in crypto instead of using the previous payment method.

The agency did not want to risk the relationship and needed to find a solution quickly. At the same time, the team was starting from scratch: crypto had never been part of its payment process before.

“Nobody had ever asked us for crypto — until one of our largest clients said they wanted to pay that way. We couldn't risk losing them.”

— CEO, marketing agency (Europe)

For agencies facing a similar request, the question is whether crypto payments for marketing agencies can be handled without turning the request into yet another development project.

Solution

The agency started using PassimPay without API integration or developer work. After one onboarding call explaining how the merchant dashboard works, the team was able to create invoices directly in the account.

For each monthly payment, the agency creates a crypto invoice for the client in the PassimPay dashboard. The client pays the invoice in USDT on the TRON network (TRC20), and the funds are credited to the agency’s account.

This setup allowed the agency to accept USDT payments without integration and without building a separate technical flow. The process began immediately after the onboarding call.

“We expected a technical project. Instead, there was no integration at all. One call on how the dashboard works, and we started issuing invoices.”

— CEO, marketing agency (Europe)

Businesses looking at similar use cases can also review PassimPay’s Industries section.

Results

The first transaction took place on December 19, 2025. The client pays once a month, with a different amount each time. Across the latest four monthly payments, the amounts increased from approximately $300K to approximately $680K.

Payment	Approximate amount
Payment 1	~$300K
Payment 2	~$420K
Payment 3	~$517K
Payment 4	~$680K

The sequence corresponds to approximate month-to-month increases of 40%, 23%, and 32%, while the fourth payment was more than double the first. That equals an increase of approximately 127%. Together, the four payments totaled approximately $1.9 million.

“Our client pays once a month in USDT, and over the last few months the payment has grown every time.”

— CEO, marketing agency (Europe)

The scope of the case remains specific at this point: crypto payments come from one client only. The agency does not actively promote crypto as a payment option, so its other clients have not moved to this method.

Takeaway

This case shows that a B2B company can respond to a client request for crypto without making it a development project. The agency did not need an API integration: one onboarding call was enough to start creating invoices in the dashboard and accept USDT from its client.

“If a client asks you to accept crypto, you don't need a development project to say yes.”

— CEO, marketing agency (Europe)

For companies that need to accept crypto payments without integration, PassimPay provides an invoice-based option through its merchant dashboard.

FAQ

Can a business accept crypto payments from clients without integration?

In this case, yes. The agency created invoices directly in the PassimPay merchant dashboard after one onboarding call. No API integration or developer work was required for the agency to start accepting the client’s crypto payments.

Which cryptocurrency does the agency’s client use?

The client pays exclusively in USDT on the TRON network (TRC20). The agency creates an invoice in its PassimPay account, the client pays it in USDT, and the funds are credited to the agency’s account.

How often does the client pay?

The client pays once a month, and the amount varies each time. The first transaction took place on December 19, 2025. Across the latest four monthly payments, the amount increased from approximately $300K to approximately $680K.