I was a litle vague on purpose, but this was some time ago, so I can provide some other details I think. Please note that the case presenteted to the judge was about 40 pages long, this is just a very condensed version.
They needed a total of 30 documents and they said they had 28 of them, with the 2 remaining being non-critical and needed just to cover all bases. I analyzed the risks based on this information and acted accordingly with 2 things: one was signing the contract at the notary and the second was taking a bank loan.
The contract was signed with the official representative of the community of heirs and would go into effect after all other heirs have signed it, which was supposed to happen within 2 weeks. After 2 weeks I found out that not all heirs had their inhertiance papers (think 22 of 30 documents actually available) and one of those went no-contact because he had the smallest part and decided the effort isn't worth the money.
After 6 months, since the contract wasn't in effect, I haven't accessed the money from the bank, so the bank started issuing a fine (as per the contract I signed with them) of about 1000 Euros monthly (it's called Bereitstellungsprovision), which went for some months until they got their shit together.
Had I known that they didn't have all documents ready, I would not have entered the contract. Or I could have negotiated with the bank for a longer period to access the money.