Thank you for your contribution. We did not receive the house through an agent. It was listed and we then simply asked him for a viewing appointment because we found the property interesting.
Well, that basically counts as what is meant by "offered through an agent."
We have not agreed anything in writing with the agent regarding commission payment; the 3.57% is known.
That is more relevant, but also very odd. Since around 2020, in my experience, you no longer get a viewing if you have not previously (or at least at the beginning of the viewing) agreed in text form (i.e., on paper or electronically, e.g., by email or confirmation by click in a portal of the agent) to the commission obligation. Simply making contact via Immoscout is not a conclusion of an agent contract. An exception to this practice are the very rare "qualified exclusive mandates" from agents, where the owner is not allowed to sell the property themselves. In this case, agents mostly waive a commission agreement at the viewing because for the interested party there is no way around the agent later on.
I do not intend to buy the property yet, but if no other buyer is found and we now come to an agreement after terminating the contract, say in summer, are the commissions still valid?
You are operating in a gray area here. If an agent contract expires, the commission obligation generally still applies after the contract ends. In practice, this is arranged so that the owner receives a list of names after the agent contract ends, for which a commission obligation exists if the property is sold to them. Honestly, I (as an interested party) have never encountered a situation where the agent did not secure himself with the interested party. I am not a lawyer, but I could imagine that if you buy the property, only the seller has to pay a commission. Whether 3.57% or 7.14% depends on his contract.
If that were the case, then the seller would not have had to cancel, since both parties would have to pay commission anyway.
That is true to some extent, but it is easier for the seller to attract interested parties (e.g., advertise himself) if he currently has no agent contract. If he still has the agent contract and actively looks for interested parties himself or even advertises, then the agent can feel sidelined and reduce his efforts. Tip: If you believe you don’t need the services of an agent, then it is best not to contact him at all. That way you take no risk. Instead, contact the owner directly.