Anonymous order, low amount, pay within four weeks or face ordinary proceedings.
The anonymous order under Section 49a VStG is not addressed to you by name but usually goes to the registered keeper of the vehicle. The amount is capped and comparatively low. If it is not paid within four weeks of being issued, the anonymous order lapses and ordinary proceedings follow, including an enquiry into who was driving. From a legal perspective the question here is one of weighing up: paying ends the matter quickly and without a record, but a review is worthwhile where the accusation is doubtful.
An anonymous order is not formally served, so no objection period in the classic sense begins. What matters is solely the four-week period for payment.