UTB (Uitnodiging Tot Betaling) is a Dutch term meaning Invitation to Pay:

UTB: A formal notice issued by the Dutch tax authorities or other government bodies requesting payment of taxes, fines, or other financial obligations.
Content: The UTB will detail the amount due, the reason for the payment, and the deadline by which the payment must be made.
It is an important document in the Dutch financial and administrative system, requiring prompt attention to avoid penalties.

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