Older people tend to have less distinct fingerprints than young people. The consultants at BIC have encountered some cases where elderly applicants were not able to provide their fingerprints at UK Visa Application Centres, because of the difficulty to scan their fingerprints.
BIC took up the issue with one of the UK Visa Application Centres, who informed us that they will take scans of the fingerprints, and make a note on their system.
They further recommend that in cases like this, the applicant tries to do an iris scan. Some UK Visa Application Centres do not have this facility yet. They can, however, arrange for the applicant to provide the iris scan at a UK High Commission.
Please feel free to contact your BIC consultant for more information regarding the above.