Distinguishing letters on behalf of the Guardian from his secretaries' personal letters

[Sen McGlinn]

My latest YouTube video centres on a 2019 letter on behalf of the Universal House of Justice, which says that sometimes the letters of secretaries have been confused with those written on behalf of Shoghi Effendi, and gives one criterion for telling which is which. The letter is online here:

Error 404

I am glad to see that an issue I raised back in 1994 is now being taken seriously. But I do not think this 2019 letter is a complete answer.
The video is here:

 

[TheLightWithin]

My latest YouTube video centres on a 2019 letter on behalf of the Universal House of Justice, which says that sometimes the letters of secretaries have been confused with those written on behalf of Shoghi Effendi, and gives one criterion for telling which is which. The letter is online here:

Error 404

I am glad to see that an issue I raised back in 1994 is now being taken seriously. But I do not think this 2019 letter is a complete answer.
The video is here:

Thanks for posting. I followed the link and subbed to your channel.