It's really not strange at all.

That is how AO sends many of the messages related to org and towers.

That particular one however is not handled by BeBot, and I don't have any tool to easilly look it up from the AO cd_image/text/text.mdb file offhand.

Thus, offhand you would need to correlate it with how it is displayed by the AO client to get the plaintext version.

Danke.

I had lost track of it and could not find it yesterday

Thus the message reads:
[196585349] Your city upkeep payment of %d credits is due in %d hour(s). Please make sure the full upkeep amount is available in the organization bank or you will lose your city.