I always find Theosophy mentioned in almost any paranormal/afterlife book I come across nowadays. Rudolph Steiner is mentioned a lot. Trouble is these people tend to get readily dismissed as crackpots, lumped in with all the fake ectoplasm tricks and even worse linked in with the Thule society, Neonazis and Vril technology.

Question?? Has her spirit ever made contact via a credible medium and has the message been, as much as is possible, fully validated??

No. As a matter of record Blavatsky wrote this promise to never visit mediums after her death:

Quote:

While it is yet time, both the founders [Olcott & HPB] of the Theosophical Society place upon record their solemn promise that they will let trance mediums severely alone after they get to “the other side.” If after this, any of the talking fraternity take their names in vain, they hope that at least their theosophical confrères will unearth this paragraph and warn the trespassers off their astral premises.

Did anyone ever claim this contact though? I guess, they would have proven themselves as fraudulent?

Strange though that she wouldn't want to make contact? Was that the same with Steiner??

more from N. Sri Ram
 

This universe is regarded by many modern astronomers as dead, except for a
little patch of life on this and possibly a few other planets. But according to the view
I am putting forward, which is also the ancient view, it is a universe of life. Life is
everywhere—even in the smallest speck—though manifested in different degrees,
matter being its vehicle or medium. Since you cannot ask for a material proof of a
non-material reality, any more than you can ask for proofs of the so-called geometry
of space, you have to regard this view—the essential independence of life—as a
hypothesis, which, the more you consider it in relation to facts of our experience,
confirms itself all the more.
If life is not a mere patch on matter, bound to consume itself like a brush-fire, and
if life is in every particle, then it is a universe of evolution. We know that life in any
form has this extraordinary quality, which not only grows, reproduces, and adapts,
but also brings out of a seemingly inexhaustible store new species, new capacities,
new ways and methods of action. In other words, it ascends.
Life means consciousness—the capacity to respond, to register, to be aware—and
consciousness gives rise to intelligence. Although we see this intelligence in the
activities of Nature, we see its unfettered action in man who constitutes at present,
at least in his own estimation, the summit of evolutionary progress. But is this the
summit or are there higher heights to be reached? The future will show.

From "Our Place in the Universe"

Sacred Seasons
 

This morning, Pacific time, the Summer Solstice of 2015 occurred. Here is a little of G. de Purucker's teachings on this Great Renunciation, from his The Four Sacred Seasons booklet:

Summer Solstice

We now celebrate the third of the great spiritual and psychical events of the esoteric year, the initiation cycle centering in the Summer Solstice; we celebrate in teaching and by spiritual and intellectual suggestion the actual events of the initiations which take place at this time elsewhere on the surface of the globe.

It is a most suggestive thought, and one that we should carry with us always — each one of us as his or her most prized ideal — that anyone belonging to the outer ring of the mystic Body can, if he or she so will, some day pass from the outer ring to an inner ring, and from that inner ring to one still nearer the center; and so on, until finally, if the disciple prevail in the conquest of self and in the enlargement of consciousness, he shall one day reach the center, and thence by his own will and act be swept into the initiatory life-currents which will bear him on the mystic pilgrimage, on the esoteric round of experience, and return a willing and self-conscious renouncer of what he knows he can get, but which he refuses in order to remain and to help the world as one of the stones in the Guardian Wall surrounding humanity.

Key of Altruism
 

Revelation Within
 

Katherine Tingley The Gods Await

A newish blog on theosophic topics:

https://circleofasia.wordpress.com