Add-on: Mollie payments

In Beta. Contact support@storeganise.com to request access.

The Mollie Payments Add-on lets you connect your Mollie account to Storeganise so you can accept credit card and SEPA Direct Debit payments directly from customers. Payments automatically link to invoices, and customers can manage their payment methods in the Customer Portal.

Prerequisites

  • A Mollie account with business verification completed
  • Storeganise invoicing currency set to EUR (Mollie Add-on only supports EUR)
  • Storeganise team has installed the Add-on for your business (contact support if it’s not yet enabled)

How to connect your Mollie account

Please note this section is for demonstration only. Currently, all Add-ons must be installed by a Storeganise team member. Contact us to install an Add-on.

If your Add-on has already been installed, you can skip to step #3.

Note: The demo below is interactive.

  1. In the Management Portal, go to Main settings > Add-ons.
  2. Find Mollie Payments and click Enable.
  3. A task appears prompting you to connect with Mollie. Click the link.
  4. Sign in to your Mollie account and select your organisation profile.
  5. Click Connect to complete the authorisation.
✅ Once connected, Storeganise will automatically detect your invoice currency. You don’t need to manually configure the currency code.

Understanding Mollie Add-on updates

When you install or update the Mollie Add-on, Storeganise automatically creates custom fields needed for payment tracking and processing.Invoice custom field: Mollie Payment IDThe Add-on automatically creates a custom field called Mollie Payment ID on all invoices. This field stores the unique payment identifier from Mollie whenever an invoice is charged, enabling you to:
  • Match invoices in Storeganise with payments in your Mollie Dashboard
  • Track and troubleshoot payment issues
  • Generate accurate financial reconciliation reports
ℹ️ Note: This custom field is created automatically during installation. If you installed the Mollie Add-on before this feature was added, you can trigger an update by toggling any Add-on setting (such as turning Test mode on and then off).

Configuring payment methods

Note: The demo below is interactive.

In your Mollie Dashboard:
  1. Go to Organisation settings > Products > Payments.
  2. Select the payment methods you want to enable.
⚠️ Currently, the Add-on supports:
  • Credit cards (listed as “Cards”)
  • SEPA Direct Debit (requires iDEAL to create a mandate)
Make sure you complete all Mollie compliance checks so these options become active.

Important: Currently, the Add-on only supports Credit cards (listed as "Cards") and Direct Debit (listed as "iDEAL"). Make sure to complete all the necessary Mollie compliance requirements for these to be added to your account.

Advanced configuration (custom booking flows only)

⚠️ Warning: The following setting is for custom booking flows only and requires special integration work. Do not enable this feature without consulting Storeganise support first.
Charge full amount upfront for iDEAL
By default, when customers set up SEPA Direct Debit using iDEAL, they're charged €0.01 as a verification payment. A checkbox setting exists in the Add-on settings to charge the full invoice amount upfront during iDEAL registration instead.Important considerations:
  • Custom portals only: This feature is designed for operators using custom booking portals (not the standard Storeganise booking flow)
  • Configuration requirements: Requires specific technical integration and site configuration changes
  • Auto-charge must be disabled: The "Auto-charge invoice" site setting must be turned off for this feature to work correctly
  • Support required: Contact support@storeganise.com before enabling this feature to ensure your setup is compatible
When to use this: Only if you have a custom booking portal integration where you need to collect the full first payment immediately during the iDEAL setup process, rather than charging it later via SEPA Direct Debit.Default behavior (recommended): Keep this setting disabled. The standard €0.01 verification creates the SEPA mandate, and full invoice amounts are charged automatically via direct debit once the mandate is active.

How customers add payment methods


Credit card: Customers add their card via a secure Mollie checkout page. Mollie verifies the card with a €0.00 authorisation (not charged, immediately released).SEPA Direct Debit: Customers complete a one-time €0.01 iDEAL payment to authorise their bank account. This creates a SEPA mandate that allows future invoices to be charged automatically via direct debit.Important: The €0.01 iDEAL payment is a verification charge that may or may not be refunded depending on your bank or card scheme. This is standard practice for setting up SEPA mandates.Customers can add or update payment methods:
  • During online booking or move-in
  • Anytime in Customer Portal > Billing > Payment method (only after completing a move-in)

Charging invoices

You can charge invoices manually or automatically.To charge manually:
  1. Go to Customer > Billing in the Admin Portal.
  2. Select an unpaid invoice.
  3. If the customer has a valid payment method, click Charge.
  • Credit card payments are processed instantly.
  • SEPA Direct Debit payments take 2–3 business days to clear. During this time, invoices show as Pending.
To charge automatically:
  • Enable Automatic invoicing in Storeganise. Payments will run automatically using the customer’s stored mandate.

Payment reconciliation and tracking

Each invoice that's charged through Mollie automatically stores the Mollie Payment ID for reconciliation purposes. You can find this information in the invoice record's custom fields.Why this matters:
  • Cross-reference Storeganise invoices with payments in your Mollie Dashboard
  • Track payment status and resolve disputes
  • Generate financial reports with complete payment details
  • Audit trail for all payment transactions
The Mollie Payment ID is automatically added when an invoice is charged and appears in the invoice details.

Understanding payment statuses

  • Paid – Payment completed successfully
  • Pending – Payment is processing (SEPA Direct Debit only). Typically clears within 2–3 business days
  • Failed – Payment was declined or unsuccessful

What happens with each status:When a payment is Paid:
  • Invoice is marked as paid immediately
  • Customer can see the paid invoice in their Customer Portal
  • Mollie Payment ID is stored in the invoice for your records
When a payment is Pending:
  • Normal for SEPA Direct Debit payments
  • Invoice shows as "Pending" in Storeganise
  • Customer can still complete their booking or move-in
  • Status automatically updates to "Paid" or "Failed" within 2-3 business days
When a payment Fails:
  • Invoice returns to unpaid status
  • Customer receives notification to update their payment method
  • You can retry charging once the customer adds a valid payment method

Troubleshooting

Invoices stuck in PendingThis is normal for SEPA Direct Debit payments. They take 2–3 business days to clear. If you'd like a customer to complete a move-in while the invoice is pending, you can use the "Auto complete move-ins with unpaid invoice" Add-on. The invoice status will automatically update once Mollie confirms the payment.Payment methods not showing for a siteMollie Add-ons work at the site level. If a customer has multiple sites, they must add payment methods separately for each site. Payment methods from Site A won't appear when booking at Site B.Failed paymentsWhen a payment fails, the customer receives an automatic notification. Ask them to:
  1. Go to Customer Portal > Billing > Payment method
  2. Update or add a new payment method
  3. You can then retry charging the invoice manually
Finding payment details in MollieEach charged invoice includes a Mollie Payment ID in its custom fields. You can use this ID to find the corresponding payment in your Mollie Dashboard for detailed transaction information.Missing Mollie Payment ID in invoice recordsIf you installed the Mollie Add-on before the Mollie Payment ID feature was added, you may need to trigger an update. Go to Main settings > Add-ons, open Mollie Payments settings, and toggle any setting (like Test mode on/off) to trigger the custom field creation. All future charged invoices will then include the Mollie Payment ID.

Quick start (cheat sheet)

  1. Enable Mollie Add-on in Main settings > Add-ons.
  2. Connect your Mollie account via the task prompt.
  3. In Mollie Dashboard, activate Credit card and/or SEPA Direct Debit.
  4. Customers add payment methods via booking, move-in, or the Customer Portal.
  5. Set invoicing to Automatic for auto-charges.

Frequently asked questions

1. Why is my invoice marked as "Pending" after using SEPA Direct Debit?

SEPA Direct Debit payments are not processed instantly. When a customer pays using iDEAL to set up a SEPA Direct Debit mandate, the invoice will be marked as "Pending" until the payment clears. This typically takes 2–3 business days. The invoice status will automatically update to "Paid" or "Failed" once Mollie confirms the result.

2. Can a customer complete their booking if their invoice is pending payment?

Yes. When using SEPA Direct Debit, customers can complete their booking or move-in while the invoice shows as "Pending". The unit will be reserved, and the invoice will automatically update to "Paid" or "Failed" within 2–3 business days once the payment clears.

3. What if a customer updates their payment method after an invoice is already generated?

Any future charges—including outstanding pending invoices—will use the updated payment method. Mollie always uses the most recent valid mandate when processing payments.

4. Will customers see their full IBAN or card number in Storeganise?

No. For security and privacy, customers only see partial details. Credit cards show the card type and last 4 digits (e.g., "Mastercard ending in 1234"). SEPA Direct Debit shows the IBAN with only the last 4 digits visible (e.g., "IBAN3567"). This complies with European data protection requirements.

5. What does "Mollie (Credit card)" mean on an invoice?

This indicates the payment was processed using Mollie, and the method used was a credit card. You'll also see "Mollie (Direct debit)" for SEPA payments.

6. Why do I see a Mollie Payment ID in my invoice records?

Every invoice charged through Mollie automatically stores the Mollie Payment ID in the invoice custom fields. This helps you match Storeganise invoices with transactions in your Mollie Dashboard, resolve payment disputes, and generate accurate financial reports. This tracking happens automatically—you don't need to configure anything.

7. Why can't my customer see their payment method when booking at a different site?

Mollie Add-ons work at the site level. Customers must add payment methods separately for each site. Payment methods added for Site A won't appear when the customer books at Site B. This ensures proper financial separation between different storage facilities.

8. What is the "Charge full amount upfront for iDEAL" setting?

This advanced setting is only for operators with custom booking portal integrations. It allows charging the full invoice amount during iDEAL setup instead of the standard €0.01 verification. This feature requires special configuration and should only be enabled after consulting with Storeganise support. Most operators should leave this disabled and use the standard SEPA Direct Debit flow.

If you need help configuring Mollie Payments or have questions about invoice charges, contact our support team.
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