Might need authorisation from the Swiss authorities.
" Other foreign nationals living abroad
Apart from cross-border commuters, foreign nationals living outside of Switzerland require authorisation to buy property."
https://www.ch.ch/en/housing/homeown…-authorisation
Also I expect any bank who provides the mortgage would have to agree to him being a part-owner as well.
Would it not be possible instead to get credit from dad, like half of the 20% downpayment? With payback over time, ideally following a predetermined schedule?
Whatever you do, make sure you agree on the applicable currency, longer term the CHF is bound to appreciate against the one "back home" but the interest rate will be lower in CHF. Also, ownership might be much more tricky tax-wise than a credit.
What tax implication are there for your father in his home country? Something he should check.
In any case, if you do it, be sure to draw up the contract between the parties in detail and very clearly, and then get it checked by a lawyer.
Also consider the implications for inheritance (in both directions!) and how the death of your father, or of you yourself, would influence all other heirs such as spouses, siblings, parents and children, in accordance with the inheritance laws in both countries. In fact, such a joint ownership scheme should be done only in conjunction with everyone updating their Last Will and Testament.
Wrong. All foreigners which are not Swiss residents are equally subject to the Lex Koller. No special privileges for EU/EFTA nationals https://www.fedlex.admin.ch/eli/cc/1…8_1148_1148/en
Just as an example: If the father lives in France, than the property could be subject to double inheritance tax!