As well as looking at references, you should also check the applicant's qualifications, especially when the qualification is essential to the position you want to fill. In some professions, applicants must be in possession of specific qualifications before they can practice.
You can check qualifications by asking to see the candidate's certificates. Alternatively, you can check with the awarding bodies or use one of the checking services - such as Experian.
The Scottish Qualifications Authority (SQA) can provide you with details of the qualifications it accredits. Information is also available about the competence and performance levels they are based on.
The UK National Academic Recognition Information Centre (UK NARIC) can help you compare overseas qualifications with UK equivalents.