I wasn't aware that "proof of income" was needed to obtain a NIE number?maureenscot wrote:gerryh. Your sons could apply for NIEs via the consulate from home. If they are non-residents, they do not need the proof of income. They can just say they are looking to buy a house and use your address.
I know it is usually needed to apply for what is commonly known as resedecia.
Applying via a consulate from home would be far more expensive, due to travel costs, fees etc than applying here at our local police station.
Cheers
Gerry