a2eb26c5_hant_Interface___WebMoney_Wiki__Field
[HTML Field Name] LMI_PAYMENT_CREDITDAYS [Description] In case the customer pays from their C-purse to the merchant's D-purse (credit sale variant) this parameter transmits credit period specified in days. We strongly recommend that you verify the equivalence of the value of this field in the prerequest form with that of the payment request form. [Field] 
Credit period
Web Merchant Interface - WebMoney Wiki
Field