Is it possible that the registration gets denied?
Yes, it is possible. The registration of a domestic partnership may be denied for the following reasons:
If the registration is made by unemancipated minors; that is, they are not living independently of their parents or legal tutors.
If the registration is made by de facto separated individuals; that is, individuals who have divorced from their former partner but not judicially or legally, just when it comes to the other aspects of their life together: they no longer live together, they no longer have joint bank accounts, etc. There must be legal recognition of the divorce in order for the new civil partnership to be registered.
People who already have a registered partnership with another person, or with the same person in another place (for example in a different Spanish region). You can only register your civil union in one region. If, for whatever reason, you want to register in a different one, you must first cancel the initial registration.
If you are blood relatives up to the third degree (parents, grandparents, grandchildren, children, nieces, nephews, uncles, etc.).
Ifthere are second interests and the registration is made for convenience (under condition or you just want to register the partnership temporarily); for example if one of you is a foreigner and you do it only to get the residency in Spain.
