Delhi Apostille. Apostille and Attestation Services is a complex and stringent process during immigration where the applicant has to fulfill multiple international regulations and data authentication requirements. With its team of qualified and experienced advisors, Delhi Apostille works closely with applicants to help them through the complex legal and attestation requirements involved in the entire period. Our specialty is getting the certificates attested from various government departments and agencies. Our countrywide team of Advisors is also experienced in understanding the requirements at various stages of your application irrespective of the country of immigration.