Sample proof letter of English as a medium of instruction

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Good day everyone! Could I ask a sample proof letter showing that the school i've studied was their medium of instruction is in english. Thanks!
To whom it may concern:
This letter confirms that [name of school], [address of school] conducted classes solely in English.

[name of person]
[title of person]
Veteran Member27,495
Proficient Speaker: Users in this role are known to maintain an excellent grasp of the English language. You can only be promoted to this role by the Englishforums team.Retired Moderator: A moderator who has retired.Trusted Users: Trusted users are allowed to use additional capabilities of the site such as private messaging to all users and various other advanced features. You cannot join this role unless you are promoted by an administrator.
is that enough to prove?
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