Do the angels (good or fallen)  know for certain that an individual is in heaven, hell, or purgatory? Be it my grandfather or Martin Luther.

Presumably they sit in on the deceased’s particular judgements, right?

Do the angels (good or fallen)  know for certain that an individual is in heaven, hell, or purgatory? Be it my grandfather or Martin Luther.

Presumably they sit in on the deceased’s particular judgements, right?

Seems impossible they would not know. Certainly the angels know since there can be no strangers in heaven.

Certainly the devils know since they launch their greatest assault upon our conscience in our last moments, drooling with anticipation of dragging us to hell. So if we make it to heaven, they have to leave empty handed, as such would know for certain they did not get us which can only mean we went to heaven.  

I don't know if the angels sit in on our judgement, hopefully they do - along with Our Blessed Mother and all the other heavenly patrons we've prayed to, along with all the souls in purgatory we've prayed for in this life who've been released, begging God on our behalf to have mercy on our soul and reward us heaven.

But far as I know, we are to be prepared to face God, naked, alone and accused......

Dies Irae:

That day of wrath, that dreadful day,
shall heaven and earth in ashes lay,
as David and the Sybil say.
 
What horror must invade the mind
when the approaching Judge shall find
and sift the deeds of all mankind!

The mighty trumpet's wondrous tone
shall rend each tomb's sepulchral stone
and summon all before the Throne.

Now death and nature with surprise
behold the trembling sinners rise
to meet the Judge's searching eyes.

Then shall with universal dread
the Book of Consciences be read
to judge the lives of all the dead.

For now before the Judge severe
all hidden things must plain appear;
no crime can pass unpunished here.

O what shall I, so guilty plead?
and who for me will intercede?
when even Saints shall comfort need?

O King of dreadful majesty!
grace and mercy You grant free;
as Fount of Kindness, save me!

Recall, dear Jesus, for my sake
you did our suffering nature take
then do not now my soul forsake!

In weariness You sought for me,
and suffering upon the tree!
let not in vain such labor be.

O Judge of justice, hear, I pray,
for pity take my sins away
before the dreadful reckoning day.

Your gracious face, O Lord, I seek;
deep shame and grief are on my cheek;
in sighs and tears my sorrows speak.

You Who did Mary's guilt unbind,
and mercy for the robber find,
have filled with hope my anxious mind.

How worthless are my prayers I know,
yet, Lord forbid that I should go
into the fires of endless woe.

Divorced from the accursed band,
o make me with Your sheep to stand,
as child of grace, at Your right Hand.

When the doomed can no more flee
from the fires of misery
with the chosen call me.

Before You, humbled, Lord, I lie,
my heart like ashes, crushed and dry,
assist me when I die.

Full of tears and full of dread
is that day that wakes the dead,
calling all, with solemn blast
to be judged for all their past.

Lord, have mercy, Jesus blest,
grant them all Your Light and Rest. Amen.