What is the difference between the approval letter and the visa or permit?
The approval letter sent by email or downloaded through the Uganda Electronic Visa/Permit web site establishes that you are eligible for the approved visa or permit, but does not establish that your applicant is definitely approved.
This final approval will be done at the selected point of entry (in the case of a visa) or at the Immigration Office Headquarters where the visa or permit sticker will be printed and it will be pasted to the passport.