I've been out for a long time, so take this fwiw. I was told I would be "damaged goods, like a rape victim" if blood was forced upon me. We're not talking voluntarily, and then repenting. We're talking full-on being forced, held down and transfused.
You may need to know the background on what this insult exactly means in dubdom. @ that time, rape victims were considered damaged until the New System, when jehoho would remove the taint and wipe the memory of it from the minds of both the victim and her fellow sisters and brothers.
I was told no one would marry me (a bigger deal for dubbies than it even is for normals). My very cells would always be stained with the sin. I would never be able to get it out of my body until jehoho fixed it after Armageddon. (Part of that is rooted in their medieval beliefs about biology. You can find more in Golden Age magazine--they believed the life force [soul] resided in the blood and thus you would be somewhat inhabited by the donor. I was asked, "OMG, what if a criminal donated the blood you were given?")
Also, I do not remember repenting from voluntary transfusions to be any actual option. Perhaps they said that on paper, not sure. Could be one of those things they say verbally differently than what's in print. I thought taking blood was considered a sin worthy of bloodguilt (similar to a mortal sin), that you can only redeem by dying. That's what I was told.
Depending on the circumstances, the committee may also need to arrange for an announcement to the congregation: "The elders have handled a matter having to do with [name of person]. You will be glad to know that spiritual shepherds are endeavoring to render assistance. On the other hand, if the elders on the committee determine that he is unrepentant they should announce his disassociation."
What version did you get this from? I've never heard of that announcement.