Please note, you do not require a letter from your doctor to show that you do not need to wear a face covering.
If you have a condition which means you cannot wear a face covering, you only need to say if asked, that you cannot wear a face covering because you are exempt.
You may be asked by a member of shop staff to provide the reason, however there is no requirement for an individual to provide medical evidence of the reason for not wearing a face covering.
For more information re Coronavirus and face coverings refer to the Northern Ireland government website by clicking HERE.
You can also download to your mobile phone, a face covering exemption badge or print a hard copy HERE