Via Viseca customer service or, in the event of theft or loss, via the 24-hour card blocking service.
Customer service: phone +41 58 958 84 00, fax +41 58 958 88 85
24-hour card blocking service: phone +41 58 958 83 83, fax +41 58 958 83 30
For prepaid card(s): phone +41 900 773 729 (CHF 1 per call)
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