Hello @Mayoo
Most specialised services block the money for 12 months. Now if you find one that blocks the money for 2 or 3 months, and it allows you to get your visa, do let us know for the happiness of the community 
[quote=« Mayoo, post:31, topic:3179 »] We are talking about an irrevocable transfer certificate, in the event that I do not get the visa, would I not be able to unblock the account? [/quote] If you do not get the visa, you just need to show the visa refusal letter from the French embassy to unblock your money in full.
Best regards