A method for checking an authenticity feature having an optical storage phosphor, to an apparatus for checking, an authenticity feature and to a value document having an authenticity feature. The authenticity feature has an optical storage phosphor. In one step, the optical storage phosphor is subjected to at least one query sequence, respectively comprising at least a first readout process and a second readout process. At least a first and a second readout measurement value are captured, which respectively are based on the detection of an optical emission in response to the respectively first or the respectively second associated readout process. A readout measurement value time series is created and is respectively associated with the at least one query sequence, comprising at least the first readout measurement value respectively associated with the first readout process and the second one respectively associated with the second readout process.