Frequently asked questions*

*and the answers to them, of course

About Mondu

Mondu is a Berlin-based fintech company that enables B2B merchants and marketplaces to offer Buy Now, Pay Later payment methods to their business customers. These methods let customers buy goods and services and pay for them at a later date. Mondu’s payment methods include purchase on account by bank transfer, purchase on account by SEPA direct debit and purchase by installments. 

Merchants get paid promptly after placing an order with Mondu and are thus protected from the risk of default. They also save themselves from operational tasks involved in dunning and collection procedures.

With Mondu’s payment solution for online checkout, merchants and marketplaces can offer their business customers the most popular payment methods in B2B: Invoice Purchase, SEPA Direct Debit and Installments. Offering these methods enables an increase in conversion rate by around 40% and a growth in average shopping cart size by 60%, according to Mondu’s data. 

Mondu also ensures a fast payout after each invoice, takes on the default risk and reduces the operational tasks associated with payment allocation. In the event of a missed payment deadline, we take care of the dunning process and, if necessary, initiate the collection procedure.

​​According to surveys by ibi Research, 95% of all companies in Germany would like flexible payment terms for online purchases. However, only 45% of all B2B web stores currently offer Buy Now, Pay Later to existing and new customers at their checkout.

Merchants and marketplaces that offer flexible payment terms can gain a competitive advantage while increasing their conversion rate, average order values and sales. 

For buyers, payment terms have a positive effect on cash flow. This is a critical benefit, especially in times of inflation, that can help merchants and marketplaces attract and convert new buyers.

Mondu has high acceptance rates and provides real-time approval. A credit check is run in the background using an algorithm to authenticate B2B buyers. The decision is made within 0.2 seconds. Mondu accepts up to 90% of shoppers in the checkout (including new customers) and supports large basket sizes.

We aim to offer B2B buyers the same payment experience as in B2C. That’s why our acceptance rate for business customers is also around 90%. We offer B2B customers unmatched added value at the checkout, while merchants benefit from increased sales thanks to our high acceptance rates.

The security of your data is of the highest importance to us. We only store data that is relevant for identification and credit assessment. You can find more information here.

With Mondu, merchants can integrate various Buy Now, Pay Later payment methods into their checkout. Currently, Mondu offers invoice payment by bank transfer, invoice payment by SEPA direct debit, and installments.

Typically, buyers can pay their invoice in 30, 45, 60 or 90 days or 3, 6 or 12 monthly installments via Mondu’s installments plan.

For Merchants

Invoice & Payment

Contact our sales team by clicking here. After submitting the contact form, a member of our sales team will contact you.

Our onboarding process consists of two steps:  

  1. Regulatory onboarding: Due to the Money Laundering Act, our partner bank is required to perform various identification and verification steps (KYC) with our new and existing customers. 
  2. Technical integration: The technical integration of Mondu payment methods into your webshop is independent of the regulatory onboarding. Our dedicated integration team is there to support you every step of the way.

The KYC process (“Know Your Customer”) refers to the mandatory procedure of identifying and verifying new and existing customers. Due to the Money Laundering Act, our partner bank is obliged to check our customers’ identities regularly. In addition to data and documents relating to your company (e.g., an excerpt from the commercial register, list of shareholders and/or excerpt from the trade register), data and documents (e.g., proof of address and identification) are also requested for the authorized representative and the beneficial owner(s).

Our KYC experts are there to support you at any time in carrying out this process. Integrating Mondu as a payment method in your webshop is only possible after successfully completing this process.

You can perform technical integration directly via our API interface or plug-ins offered by commercial e-commerce solutions such as Shopware, JTL and Magento.

We provide you with a dedicated integration manager to enable you to enjoy a smooth and personalized integration experience. In a joint kick-off meeting, your integration manager will address the individual specifics of your system and define a clear schedule for efficient implementation.

Mondu currently supports the following systems: Magento2, Shopware 5, Shopware 6, WooCommerce, JTL 5, JTL Wawi. No matter which of these store systems you use, we will support you every step of the way!

Yes, our solution supports all types of businesses – from sole proprietors and limited liability companies to freelancers and public institutions.

No, Mondu bears the risk of default and pays you after each invoice.

Limits & Risk Management

Mondu provides all buyers with a limit that can be used to purchase goods or services. We use external and internal data to check creditworthiness and decide how much a buyer can spend using our payment methods.

In individual cases, the limits for buyers can be increased. Please contact our Customer Success Team for assistance.

A good payment history with Mondu and other financial institutions helps to make a positive decision in favor of the buyer.

Mondu continuously takes measures to identify and combat fraudulent behavior to protect merchants and buyers.

Our fraud prevention team leverages its industry knowledge and AI and machine learning models to create comprehensive fraud detection and prevention policies within our Risk Engine. In addition, our partnerships with external data providers ensure we have the tools we need to prevent fraudulent behavior. As a matter of policy, Mondu ensures that all buyers are adequately identified through a credit check before approving a purchase.

Mondu bears the risk of payment defaults. We provide you with the contractually agreed purchase price for the purchased receivables and are thus protected against potential payment defaults.


There can be several reasons why an order was rejected. One possible explanation is that the maximum limit was exceeded.

Depending on the integration type, an order can be adjusted directly through your webshop backend or Mondu systems. 

Please note that an order can only be canceled if no invoice has been created. Also, the order value cannot be increased after we have confirmed an order.


Mondu requires detailed information about customer invoices for your payout and for calculating buyer payment terms.

Only sellers create and send invoices to customers. Mondu does not send official invoice documents to customers, only payment information.

It’s not yet possible to extend payment terms. However, we are working on such a feature.

Yes. Merchants need to place a Mondu note in the payment terms block for invoices with Mondu as the payment method. You will receive the exact Mondu note from us as part of the integration process.

Please coordinate with the buying company if you can forward the money directly to Mondu. If so, please provide the payment reference that can be found on the invoice.

Cancellations & credits

Communicate the credit note to Mondu via the integrated communication channel so Mondu can reduce the claim against the buyer accordingly.

Only sellers create and send invoices to customers. Mondu does not send official invoice documents to customers, only payment information.

As long as no invoice has been transferred to Mondu, you can cancel the order in your systems or through the Mondu Merchant Portal. There are no further costs to you and Mondu will inform the buyers about the cancellation of the payment agreement.

Dunning & Collection

To help buyers keep track of the payment deadline, we send them email reminders before the deadline. If we don’t receive payment on the due date, we will remind the buyer again on that day. Our dunning system kicks into action only if an invoice is not paid in full 5 days after the due date. We then send emails and letters to buyers in a predefined cadence on behalf of Mondu. On the 28th day after the deadline, we hand over the debt to an external collection service provider, who then takes over the process.

You cannot currently pause reminders yourself. If this should become necessary, please contact

Mondu bears the credit risk for the purchased invoices. In the event of insolvency, you will not incur any additional costs. (See also “Who covers potential payment defaults?”).

Fees & payment

The billing of the fees takes place with the payment to you. You will receive the invoice from our partner bank minus the budget billing amount and the VAT due on the budget billing amount. The budget billing will be shown in a monthly collective invoice to you.

You will receive a payout report from us detailing which receivables have been purchased. The report shows how the disbursement amount is made up, what fee has been applied and what sales tax has been incurred.

Whether your customers are charged depends on the terms of the payment method.

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Mondu's communication with buyers

Transparent and proactive customer communication is important for a pleasant buying experience. Therefore, each step of the payment process, such as an invoice or payment receipt, is communicated to customers via email.

It’s important to us that your buyers have a positive experience once they select Mondu as their payment method. Our Operations Team ensures that all issues and inquiries are resolved to provide the best service to your buyers. If you have any questions, please contact our Operations Team at

Customer Success

Do you have any other questions that are not answered by our FAQs?

If so, please feel free to contact our Customer Success Team, who are personally available to answer any questions or address any issues related to Mondu. 

Our Customer Success Team is available by email from Monday to Friday from 09:00 to 18:00.


Contact form:

Postanschrift: Alexanderstraße 36, 10179 Berlin

For Buyers

After selecting a Mondu payment method for your B2B online purchase, we send you an email to provide you with the relevant information regarding your purchase.

Invoice & Payment

Invoice payment 

As soon as we receive your invoice from the merchant, we will send you an email with further information about the payment process.

Please note that the payment is made to Mondu (not to the merchant). We ask you to make sure that the transfer is made to the IBAN number provided in the invoices and emails, and that you include the reference number.

SEPA direct debit

As soon as we have received your invoice from the merchant, we will send you an email with the date for payment collection via SEPA. We will inform you seven days before the collection date about the upcoming payment.

We ask you to make sure that the deposited account is sufficiently covered. In case of a rejection, we will send you an email and ask you to transfer the invoice amount. Once there is a rejection, we won´t direct debit the amount the second time.

SEPA Direct Debit – Installment invoice

As soon as we have received your invoice from the merchant, we will send you further information about the installment plan and the payment procedure. We will inform you seven days before the collection date about the upcoming payment for the installment rate.

We ask you to make sure that the deposited account is sufficiently covered. In case of a rejection, we will email you and ask you to transfer the installment rate, as the rejected installment won’t be direct debited again.

In case of a second rejection, we will cancel the SEPA direct debit and the entire amount will be due to pay.

Yes, of course. You can pay the invoice at any time within the payment deadline. You will receive confirmation as soon as the payment is received (for a bank transfer, this usually takes 1 to 3 working days).

If you selected SEPA Direct Debit as your payment method, the payment collection date is fixed and cannot be changed.

Don’t worry! We will transfer the difference to your bank account and inform you as soon as we’ve made the transfer. If you don’t receive the difference within two weeks, please contact our support team at  . We will be happy to assist you.

We will keep you informed about your payment status. To avoid reminder fees, please transfer the outstanding payment as soon as possible.

Be sure to check the recipient, IBAN and reference number for your transaction. You can find them in the invoices and the payment details emails. If all the information is correct, you should have received a payment confirmation within three business days of making the payment. Please also check your spam folder.  

If you have not received a payment confirmation, please contact our support team at and attach a payment receipt. We will be happy to help you.

The merchant will send you an invoice with the payment details as a PDF once the order has been shipped. In addition, Mondu will also send you an email with all the payment information. If you have any questions, please contact the merchant directly.

Net Terms
Mondu typically offers payment terms of 30, 45, 60 or 90 days, but ultimately it is the merchant that chooses what payment term to offer to you. You will find the payment term on the invoice we sent you via email. Please pay the entire invoice amount before this period expires. 

Installment payments
Installment payments are offered over 3, 6 or 12 months via SEPA direct debit. The payments occur monthly for the period you select at the time of purchase.

The terms and installments payments may vary per merchant. 

Rejection & Return

There can be several reasons why the Mondu payment method was declined, for example:  

  1. You may have outstanding invoices with Mondu that have exceeded the payment deadline.
  2. We were unable to identify your company.
  3. The mandatory credit check was unsuccessful.

If you would like to partially or entirely return an order, you must follow the return conditions of the retailer. Please contact them directly if you have any questions.

If you want to return a product before you’ve made a payment, your invoice will be adjusted accordingly and you will receive an overview of the new payment amount. 

Please contact the merchant directly to arrange a refund if you have already paid for a product.

Please get in touch with the merchant directly with any questions regarding deliveries and returns. As the payment method provider, we at Mondu cannot provide information about these processes.

Dunning & Collection

You will receive a reminder from Mondu if you have not paid an invoice by the agreed payment deadline. You can find the payment term on the invoice and the payment information email you received from us after placing the order.

Have you already paid the full invoice amount and still received a reminder?

Please check that you have included the correct bank details in the transfer order you received in the payment information email from Mondu. Also, check the purpose of the transfer. The purpose must match the one we sent you in the payment information email. This is the only way we can match your payment to the correct order. 

If all the information is correct and the reminder is invalid, please contact us at and attach a payment receipt. We will be happy to help you.

If you have a valid reason to pause the dunning process – for example, because the merchant’s delivery is delayed – you can contact our customer service team to request a dunning pause: