Do the owners of the Cyprus company have to sign the incorporation documents?

Provided the owners do not hold any statutory positions or are not direct shareholders in the Cyprus company, then no. But before the Service Provider starts a new incorporation, all new clients must sign a formal company formation order. The incorporation documents themselves (Memorandum of Association, Articles of Association, First Minutes and Resolutions) will be signed by the initial Subscriber, as provided by the Service Provider, according to the incorporation procedure as is required by the Registrar of Companies in Cyprus. In case the company owner is also the direct shareholder in the company (which is quite often the case with private holding companies), then the owner must sign the actual Memorandum and Articles of Association documents.