Your father is lying.
Tell him you don't believe it.
Ask him to show you, in print, a Watchtower document that proves it.
Here is what is in his own, personal, copy of the Elder's manual says:
Page 120-121
7. If the disfellowshipped person has moved,
a local judicial committee will hear his request for
reinstatement where he is now attending meetings. If
those elders believe he should be reinstated, they will
give the judicial committee of the congregation that
disfellowshipped the person their recommendation.
They should not let the disfellowshipped one know
their recommendation; if the other committee does
not agree, knowing that would only cause him frustration.
The committee should merely tell him that
they must correspond with the elders where he was
disfellowshipped and that he will be informed of the
decision in due course.
8. The local judicial committee should not pressure
the original committee to reinstate the person.
The elders on the original committee may be aware
of important factors not apparent to others, so it
is usually best to respect their judgment. Likewise,
the original committee should carefully consider the
recommendation of the other committee. Sufficient
time may have passed, and the individual may have
made drastic changes that the elders on the original
committee have not observed. They should keep in
mind that the elders making the recommendation
have met the individual and have had opportunity to
observe his conduct.
9. If the two congregations are reasonably
close to each other, the committee of the congregation
that took the disfellowshipping action should
promptly arrange to meet with the disfellowshipped
individual after receiving a positive recommendation
from the committee of the congregation where he
made his plea for reinstatement.
10. If the elders on the committee of the congregation
that took the disfellowshipping action
disagree with the reconunendation to reinstate,
they should dearly explain their reasons to the
other committee.