A customer demand is about to become time-barred?

In such cases, it can make sense to set up a limitation waiver.

The answer in detail

Explanation of the term limitation waiver

Contractual claims against customers generally expire after 10 years at the latest. Certain contractual claims become statute-barred after the expiry of 5 years, e.g. claims arising from craftsmanship. If you set up a limitation waiver, you can avoid expensive litigation. The limitation waiver merely prevents the demand from becoming time-barred: The demand is therefore not lost and a common solution can be sought with the debtor. Attached you will find a sample limitation waiver.

Important documents
Vorlage Verjährungsverzichtserklärung