Kitchen seller wants the remaining payment in cash, does not want a transfer

If his company is already in insolvency, it will be difficult to enforce any warranty claims. And if you are already aware of this, it is quite possible that the insolvency administrator will recover this amount from you again (InsO §82, see also BGH, judgment of 16.7.2009 – IX ZR 118/08) and you will initially pay twice – the amount you first paid to the kitchen builder you can then try to recover yourself from the bankrupt party. Good luck with that!

we have to try because the kitchen is also used commercially.

is there an ongoing insolvency proceeding, yes or no? Or what else do you mean by "investigation procedure" - against the managing director?

If his company should already be in insolvency, it will be difficult to enforce any warranty claims.

An employee of his said that he is insolvent ....I called the Chamber of Crafts yesterday, nothing is known there.

Strange .....

Search with Google for "Insolvenzbekanntmachungen" and then check there via the responsible district court and the company name if anything is available.

is there an ongoing insolvency proceeding, yes or no? Or what else do you mean by "investigation procedure" - against the managing director?

the investigation procedure is criminal... has nothing to do with insolvency proceedings

sounds already suspicious