The initial charge is an authorization check created immediately after a payment attempt is made, which is needed in order to "save" the transaction amount for when the the payment is approved. If the payment is declined, the charge will automatically void up to 48 hours, depending on your bank’s policy.
Coinmama is committed to being fully GDPR compliant. Personal information and documentation are entirely encrypted. Funding info such as credit card details aren't stored on the website or servers, they're not stored at all.