How can I prove my ownership of the company?

This depends on the actual configuration of the Cyprus company. If You are a direct shareholder in the company (without using the nominee shareholder service), then Share Certificate(s) and an entry in the Register of Shareholders serves as your ultimate “proof of purchase”. If nominee shareholder is involved, then the clients’ proof of beneficial ownership is confirmed by a declaration of trust, a deed of transfer, a nominee services agreement, a beneficial owner declaration. Regardless of the title, this document, signed by the nominee shareholder will confirm in absolute certainty who is the real owner of the company.