Contact details

Membership and billing issues

For questions regarding your membership, please see our Frequently Asked Questions section.

You can reach our customer service by email at hello@optishake.info

You can check your billing history and update your card details at optishake.info/invoices

We usually reply to messages within one business day.

Billing information

Our primary invoicing channel is e-invoicing. If you are unable to send an e-invoice, please contact us.


E-invoicing address: 003729882916
Operator: Maventa (003721291126)
Operator ID when sending from a bank network:

DABAFIHH*
*Please use this broker ID if the e-invoicing software you use cannot send invoices directly to Maventa’s broker ID.