I don't think this is how Spanish release clauses work. My understanding is that typically if a buying club wanted to activate a clause they would deal directly with the selling club and the transfer would be structured as any other (how much up front, payments over x years, whatever) and the only difference would be that the fee was already agreed upon up front. In less common cases the selling club would put up a huge fight and would refuse to negotiate at all with the buyer, and only at that point would the buyer pay the player his clause directly, plus an extra amount to cover taxes on said payment, which would then allow for the player to buy himself out. The big change came in 2016 when the Spanish tax authorities decided that the second scenario no longer constituted income (and thus no tax), which removed the incentive for the selling club to not negotiate. Now almost all transfers involving release clauses are the first kind and we're not actually giving Laporte any money directly.I don't think that is how it works,the player pays their own release clause with money we give him,there is taxes to sort out and paperwork that is up to the standard of the tax man,it's a lot to get done
That said, I'm sure there's still a ton of paperwork and it actually takes some time regardless.