voucher [ˈvaʊtʃɚ]

例句:

• Would you mind initialing this voucher?
  请在凭单上用首字母签名。
  
• a voucher for a free meal
  免费用餐券
  
• The government should run a voucher system.
  政府应该施行凭证制度.
  
• The voucher is non-refundable and no change will be given.
  来自THETIMES
• Every household is allowed to apply for one voucher per technology.
  来自BBC
• The money debited against your account turns into Lottery Voucher Credits.
  来自SA