Mass Check void and other AP items

Gurus,

1) The requirement is to have the ability to mark list of check as voided and then off set the payment document to an escheatment GL account instead of clearing account. They currently have a very huge number of checks they would escheat. I can't find any transactions that can meet mass void and post a clearing document on payment document to a different GL number.

Is there a way we can do without having a ABAP development?

2) When I creating an invoice in FB60, the payment term is defaulting from vendor master. But, the payment method is not defaulting from vendor master. The payment method field is left blank though my vendor master has payment method.

3) If I have multiple payment methods in vendor master and I have all payment methods in my proposal, which payment method the payment program considers in F110? the first payment method that is in vendor master?