A method for checking an authenticity feature having an optical storage phosphor, comprising the steps of: a. capturing at least a first measurement value, in particular a storage charge and/or a light emission of the optical storage phosphor; b. subjecting the optical storage phosphor to at least one charging process; c. capturing at least a second measurement value, in particular a storage charge and/or a light emission of the optical storage phosphor; and d. quantitatively determining an effect of the charging process on the optical storage phosphor from the at least one first and second measurement value; wherein the method comprises at least one readout process and the at least first and/or second measurement values are captured as first and/or second readout measurement values which are accordingly captured based on a detection of a light emission in response to at least one readout process, wherein, preferably, the first measurement value is captured as a readout measurement value based on a detection of a light emission in response to a first readout process and the second measurement value as a readout measurement value based on a detection of a light emission in response to a second readout process; wherein the method has at least one query sequence, comprising at least two readout processes, wherein from the first readout process a first readout measurement value and from the second readout process a second readout measurement value are captured; and the method comprises the steps of: d1. creating a readout measurement value time series 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; and e1. evaluating the readout measurement value time series respectively associated with the query sequence for determining a dynamic behaviour from the readout measurement value time series under the respectively associated query sequence; wherein in step d1. the evaluating of the readout measurement value time series is effected quantitatively in order to determine at least one characteristic memory property of the optical storage phosphor. a. capturing at least a first measurement value, in particular a storage charge and/or a light emission of the optical storage phosphor; b. subjecting the optical storage phosphor to at least one charging process; c. capturing at least a second measurement value, in particular a storage charge and/or a light emission of the optical storage phosphor; and d. quantitatively determining an effect of the charging process on the optical storage phosphor from the at least one first and second measurement value; wherein the method comprises at least one readout process and the at least first and/or second measurement values are captured as first and/or second readout measurement values which are accordingly captured based on a detection of a light emission in response to at least one readout process, wherein, preferably, the first measurement value is captured as a readout measurement value based on a detection of a light emission in response to a first readout process and the second measurement value as a readout measurement value based on a detection of a light emission in response to a second readout process; wherein the method has at least one query sequence, comprising at least two readout processes, wherein from the first readout process a first readout measurement value and from the second readout process a second readout measurement value are captured; and the method comprises the steps of: d1. creating a readout measurement value time series 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; and e1. evaluating the readout measurement value time series respectively associated with the query sequence for determining a dynamic behaviour from the readout measurement value time series under the respectively associated query sequence; d1. creating a readout measurement value time series 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; and e1. evaluating the readout measurement value time series respectively associated with the query sequence for determining a dynamic behaviour from the readout measurement value time series under the respectively associated query sequence; wherein in step d1. the evaluating of the readout measurement value time series is effected quantitatively in order to determine at least one characteristic memory property of the optical storage phosphor.