This poster summarizes the sample delivery user support at European XFEL (EuXFEL). It describes the activities of the Sample Environment and Characterization (SEC) Group in collaboration with the scientific instruments and gives an overview of the provided methods. The figure to the right shows the pulse structure of the European XFEL. Pulses are delivered in 10 Hz trains with an intra-train repetition rate of up to 4.5 MHz. The high repetition rate requires fast replenishment of the sample in the beam achieved by various liquid jet methods and aerosol sample delivery.