The UK does not accept your renunciation of your UK citizenship, even if you renounce it before a Spanish court. You can keep your UK passport and freely travel with it, but you must not use it in Spain.

Yes I understand that is true Fred but surely if Spain became aware they would or could revoke Spanish Citizenship? The point I was making is for myself 70+ I do not need a Spanish passport or citizenship the TIE with protection under withdrawal agreement allows me to live my life in Spain as I want and I am quite happy to abide by Schengen rules should I wish to visit another EU country. As I am half Irish by birth if I wanted an EU passport I could go that route but I am happy being as born a British citizen with legal rights to live full time in Spain.

Re the TIE renewal my wife did hers last month at Torre Del Mar, I know it differs or can differ depending on location. We got her appointment easily on line the appointment was for 3 days after her TIE had expired, Torre Del Mar will not renew until expired. We took the paperwork as described for renewal having paid the 790. She attended the appointment it took around 25 minutes and the lady dealing with my wife apologised it took so long but she had to keep helping her colleague with something. My wife said the lady checked paperwork took her fingerprints and told her just to come back in 4 weeks and her card would be ready, she told me wife she does not need an appointment to collect the new card just come back in 4 weeks during opening times. We are going down this Thursday to collect it. It was all simple and efficiently dealt with. Hopefully you can get your appointment and the process goes as well for you. I have to renew mine in February as I initially had the green card but exchanged it before it's expiry so my TIE was issued with an expiry date of 5 years from application for that not from date I had green card issued. I am hoping my renewal goes as well as my wife's I will be going to the same office hopefully.

Becoming an Australian citizen is a great moment though I don't see why you would be so strongly against maintaining a British passport if you happen to be a dual citizen. I mean she will still be a UK citizen and having a second passport might prove useful in many situations (travel, consular assistance overseas, evacuation of citizens during emergencies, etc.).

You would be surprised how many Australians have more than one passport. In fact almost everyone I know with Italian, Maltese, Greek or Croatian backgrounds just to name a few also have European passports. It doesn't make them any less Australian and it's the smart thing to do.

As to only having one citizenship and "one and one alone" being enough for everyone I couldn't disagree more, a complete 180 in fact. If you qualify for more than one citizenship then you should embrace the opportunity.

I always wondered how this works because technically you cannot relinquish your only citizenship beforehand because that would in effect make you stateless and is not allowed by international law.

I understand about not using the UK passport in Spain - the same also applies in many countries that allow dual/multiple citizenships.

According to this UK government website you can renounce your UK citizenship, however one of the conditions to apply to do so is that you have another citizenship. Do the Spanish authorities maybe set a time limit from obtaining Spanish citizenship to allow one to renounce their current citizenship?

https://www.gov.uk/renounce-british-nationality

I don't think so. When you are given Spanish nationality and your circumstances require you to renounce your existing citizenship, you will be told about it but that's it. No checks are made whether you have actually complied. So provided you are careful not to use your British passport in Spain (for official purposes such as immigration), there is no complication. If it comes to the notice of Spanish authorities you have used or are using your British passport, they can in theory cancel your Spanish nationality, but I have never heard of such a case.

So yes you verbally renounce but Spanish authorities must be aware that it is impossible to physically do that untill one has another nationality. I'm sure it's probably the same with most if not all nationalities. I also get that in reality it's a formality whereby one says they have renounced their nationality when they haven't . I was always of the understanding one couldn't actually renounce British citizenship but the link I put on from UK government shows that it is possible.

I don't get what you mean by this.

It means quite simply that you have lied and not followed through with the agreement you made when taking another citizenship that requires you to renounce.
I dont know what the actual words that you or anyone else who has taken spanish citizenship said, but I'm going to assume there is a statement saying you will renounce all other citizenships.

My earlier post stated as to not comply indicates to me that you would not be an honest person.
Even if you cannot actually renounce, you should at least go through he motions of doing so. If then at some point you were questioned, you could honestly say you did as requested but it was denied.

​​​​​​As to the Oz bit I posted, if you want to go into politics at any level in Oz you must only be an Australian citizen, there were cases years ago where Politicians held NZ and UK citizenship and were then disqualified from being in Government.
https://www.aph.gov.au/About_Parliam...qualifications
This says you must have gone through the process of renouncing even if it is not sucessful or allowed by the other country.

And as far as I'm concerned if Spain demands it in its citizenship requirements, you should at least have tried.

I mean people may well say they have renounced their uk citizenship but in reality keep it along with a British passport.

yes spot on

Hmm. I am going to become a Jew. I go to the rabbi and he says you have to renounce your Christian faith before coming a Jew. Does that mean sending my christening certificate back to the Church of England? Or just making a solemn declaration?

In the declaration it simply says "Que SÍ renuncia su nationalidad Reino Unido", (present tense).

If you want to know the letter of the law consult the BOE.
https://www.boe.es/buscar/doc.php?id=BOE-A-2002-19484

It says:
1. Los españoles que no lo sean de origen perderán la nacionalidad:

a) Cuando durante un período de tres años utilicen exclusivamente la nacionalidad a la que hubieran declarado renunciar al adquirir la nacionalidad española.

In English:
1. Spaniards who are not Spanish by birth shall lose their nationality:
a) When, for a period of three years, they exclusively use the nationality they declared they renounced upon acquiring Spanish nationality.

Many if not most countries require you to only be a citizen of that particular country when taking on a political role. Same with the police force or the military for instance.

Then there are countries, like Switzerland, that allow you to seek any government position without having to give up any other citizenship(s).

I agree. It's mandated and people should comply with this requirement.

But you still seem to be against someone holding two passports even if the law allows it and it is perfectly normal to do so.