Frequently asked questions and answers

What is a simple note and what is it for?

It is an official document used to inform interested parties about the ownership of a property, as well as its charges and encumbrances.

This is a concise summary of the information that appears in the Property Registry on a given property.


Drafted on: Oct. 29, 2022, 5:23 p.m. | Does 2 years
Reviewed the: Oct. 29, 2022, 5:50 p.m. | Does 2 years

What is the cadastral reference?

The cadastral reference is the official and mandatory identifier of real estate. It consists of an alphanumeric code that is assigned by the Cadastre so that every property must have a single cadastral reference that allows it to be unequivocally located in the cadastral mapping.

It is composed of twenty characters. We can find these examples of cadastral reference structure:

Example 1: 9872023 VH5797S 0001 WX

In this case, of the twenty characters, the first seven identify the farm or plot, the next seven indicate the map sheet where it is located, the next four identify the property within the farm and, finally, the last two They are control characters that allow knowing if the previous eighteen are correct, preventing (or detecting) recording errors.

Urban Cadastral Reference Breakdown

Example with breakdown of the urban cadastral reference

9872023 VH5797S 0001 WX

  • Farm or Plot: 9872023
  • Plan sheet: VH5797S
  • Property Identification: 0001
  • Control characters: WX

Example 2: 13 077 A 018 00039 0000 FP

In this case, the twenty characters correspond to the following: the first two identify the province, the next three the municipality, the next is the character that corresponds to the sector, which indicates the aggregate or zone of parcel concentration (if applicable ), the following three identify the polygon (the municipal area is divided into polygons based on the homogeneity of crops, the existence of geographical accidents, etc.), the following five identify each parcel within the corresponding polygon, the following four characters will allow detecting or identify the existing properties within the plot and, finally, the last two are control characters that fulfill the same task as that indicated in the previous case.

Breakdown of Rustic Cadastral Reference

Example with breakdown of the rustic cadastral reference

13 077 A 018 00039 0000 FP

  • Province: 13
  • Municipality: 077
  • Sector: A
  • Polygon: 018
  • Plot: 00039
  • Property ID: 0000
  • Control characters: FP

Drafted on: Oct. 29, 2022, 5:20 p.m. | Does 2 years
Reviewed the: Oct. 29, 2022, 5:24 p.m. | Does 2 years

What is the cadastral reference value?

One of the main doubts generated by this new value for taxpayers is whether it is the same cadastral value, that of a lifetime. But these are different concepts. The new reference value is determined by the General Directorate of Cadastre and as we have explained previouslyit is based on the calculation from prices of real estate transactionsthat are made before a notary and depending on the cadastral characteristics of each property. This value will be determined year after year, simultaneously, in all municipalities.

On the other hand, the cadastral value is calculated based on the report of values ​​of the corresponding municipality and the location of the property, the location within the city, age, quality of the construction, reforms or renovations in the building, or the state of conservation. This value is updated by the Budget Law, although not simultaneously or uniformly for all municipalities.

In both cases, the values ​​are objective, that is, both the reference value and the cadastral value will value two dwellings on the same floor of a building, with the same surface area, even if one of them is renovated and with the highest qualities and the other not. That is, these two values ​​do not take into account the circumstances of each property that are made in the home.


Drafted on: Oct. 29, 2022, 4:15 p.m. | Does 2 years
Reviewed the: Oct. 29, 2022, 5:24 p.m. | Does 2 years

What do the acronyms IDUFIR and CRU mean?

IDUFIR means Unique Registry Property Identifier.

CRU contains the initials of Unique Registration Code.


Drafted on: Oct. 30, 2022, 9:46 a.m. | Does 2 years
Reviewed the: Nov. 11, 2022, 9:37 a.m. | Does 1 year, 11 months

What is the IDUFIR number, and what differentiates it from the CRU and the Cadastral Reference?

The IDUFIR emerged as an alternative to the cadastral reference, providing more security and guarantees in the unique identification of properties registered in the Land Registry.

Although we can still find the cadastral reference in some documents, for example in purchase deeds prior to the IDUFIR, this quickly became the one used both by notaries and by individuals when requesting, for example, a Simple Informative Note in the Registry.

Later, in 2016, the CRU appeared, an evolution of the IDUFIR that maintained the same characteristics: 14 digits without variation over time, totally different from the cadastral reference.

Currently, given that the CRU has only been in use for a few years, the IDUFIR continues to appear as an identifier in documents such as the IBI, Simple Notes and Registry Certifications.


Drafted on: Oct. 30, 2022, 8:13 p.m. | Does 2 years
Reviewed the: Oct. 31, 2022, 6:15 p.m. | Does 2 years

What is the IDUFIR or CRU code for?

The easiest way to know the IDUFIR or CRU of a farm of which we do not own, is through a Simple Note.

Entering the virtual cadastre headquartersand entering the address of the property whose CRU you want to know, you will be able get the cadastral reference.

Once you have the address and the cadastral reference, it will be really easy request a Simple Note.

To obtain it, you can call the corresponding Property Registry, go in person to their offices or request it electronically.

The cost does not usually exceed 10 euros and, if you order it online, you can receive it in less than 48 hours depending on the registration.

▶︎ Request your Nota Simple online here (official website)

If what you want is to know the IDUFIR of your property, you can find it on the IBI receipt or, if you bought after 2004-2005, it may appear in the Deed of Sale.


Drafted on: Oct. 31, 2022, 6:33 p.m. | Does 2 years
Reviewed the: Nov. 11, 2022, 9:33 a.m. | Does 1 year, 11 months

What is the Registrar Geoportal?

The Geoportal is probably the most advanced tool in terms of locating and identifying farms.

The effort to improve transparency and facilitate access to information, both for professionals and individuals, gave rise to the development of this application.

It wasn't easy. The challenge of linking the information from the Cadastre and the different Property Registries had to be faced.

Once achieved, the result is a portal through which we can consult cartographic information of a farm, know the registry to which it belongs and request the Simple Note of the same, and thus obtain the CRU or IDUFIR.

To access, you just have to enter Geoportal Registradores


Drafted on: Oct. 31, 2022, 6:38 p.m. | Does 2 years

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