Any unused credits may be carried forward for up to 20 years following generation.

Any unused credits will remain in your account after your one year session expires.

It's nice that they send a reminder of unused credits.

After the recent disclosures, WorldCom is unlikely to have access to its $5.4 billion in unused credit, one executive close to the lenders said.

Alternatively, if they pollute less, they can sell their unused credits on the open market.

Like the company's card that imposed fees on unused credit, the loan requirement was designed to test a person's attitude toward debt.

Balances were reset after 30 days, so unused credit did not roll over.

Pay-as-you-go customers will lose any unused credit when switching service providers.

The tickets and any unused credit for transit rides will expire at the end of each month.

And unused credit left over from last year's Amazon.com gift certificate.