Attestation – verification of Personal, Educational, Commercial Documents  such as Birth, Death and Marriage Certificates, Degree and Diploma Certificates etc.
Attestation Service Companies services are

Personal, Educational, Commercial Documents Attestation
Medical Certificate Attestation
Embassy Attestation
Power of Attorney Attestation
MOFA Attestation
Degree Certificate Attestation
Diploma Certificate Attestation
Marriage Certificate Attestation
Birth/Death Certificate Attestation
Divorce Certificate Attestation
Experience Certificate Attestation
Transfer Certificate Attestation

And some of the Attestation services peoples also doing Documents Translation service also

The Omanquest  Business Listing Page listed the Companies and Agencies of Attestation Service in all region of  Oman, with current and accurate information.