What did it matter if they got the card??
For some strange reason, somebody at HQ in Brooklyn (this was long before there was a Governing Body) had the notion that having this card was supporting the Malawi government, and hence was false worship by making a political statement. It was not really - it was required for all people in Malawi as a sort of state tax and as an ID.
They did not bother to think out the fact that NOT having the card was actually making MUCH MORE of a political statement than just having it.
The whole incident is of course well described in Ray Franz Crises of Conscience.