If you customer has overpaid the invoice or double paid the same invoice, then the overpayment is noted as such in Billogram. We correct the overpayment and sent the excess amount back to your customer through the bankgiro clearing centre. The Bankgiro clearing centre sends check to the address provided by the payee's bank. 

The correct amount will therefore be paid to your bank account and the excess amount is returned to your customer.

In case that the amount of the overpayment is lower than 10 SEK, the check will not be sent automatically. Of course, we can arrange for a refund to your customer's bank account. Send a receipt for the payment, which resulted in the invoice being overpaid, to support@billogram.com and we will arrange for a refund. On the receipt, the following information is required:
- Account (sender / receiver)
- Amount
- Date
- OCR reference

A screenshot from the internet bank works great as a receipt.