Hi..Thanks for the query. Do you fear the possible scrutiny by people in authority in formal situations? Do you become too much cautious about how you look, dress, talk etc. in these formal situations? If answers to these questions are yes then you are suffering from social anxiety disorder or social phobia. That is your real problem is NOT stammering but excessive fears of unwanted scrutiny by strangers, superiors etc. in formal situations. The treatment for social anxiety consist of behaviour modifications, cognitive behaviour therapy, role play, guided imagery techniques which are taught by psychologist & anxiolytic drugs like etizolam, clonazepam in combination with SSRI group of drugs. You can consult a Psychiatrist for both set of treatments & I am sure you will do very well in these formal situations! Good luck