Registering a car seems like a simple procedure until something goes wrong. A missing document, incorrect data on the form, a tax that has not been settled on time. Any of these errors can paralyse the process for days or weeks, with the vehicle immobilised and the customer waiting.
For dealerships, these delays have a direct cost: the car remains in stock without being in the buyer's name, delivery is delayed and the buying experience deteriorates at the most visible moment. This article reviews the most common mistakes when registering a car, what causes them and what to do to avoid falling into them.
Incomplete or incorrect documentation
The first block of errors has to do with documentation. The DGT requires that all documents to register a car are in order before processing any registration or change of ownership request. A single erroneous field or a document that does not match another can generate an issue that forces you to start the procedure from scratch.
The most problematic documents are usually:
The registration certificate, especially for imported cars where the chassis data may not exactly match those on the Spanish technical specifications sheet.
The reduced technical specifications sheet, mandatory for vehicles coming from another EU country. If the homologation has not been processed correctly, the registration plate cannot be assigned.
The buyer's ID card or NIF, which must match the purchase agreement details exactly. A misspelled name or incorrect ID number paralyses the file.
The most practical advice here is to check all documents before submitting them, not when the problem has already been detected. If you work with an agency, make sure they receive the complete documentation from the very first submission.
Not paying the ITP or registration tax before processing
One of the most frequent mistakes, especially among private buyers, but which also affects dealerships when they manage the registration on behalf of the customer, is trying to process the change of ownership without having previously settled the corresponding taxes.
For second-hand vehicles, the Property Transfer Tax (ITP) must be paid before submitting the application to the DGT. For new or imported vehicles, the Special Tax on Certain Means of Transport applies, better known as the registration tax. Submitting the application without proof of payment generates an automatic issue.
The deadline to pay the ITP is 30 business days from the date of the sale. Once this period is exceeded, the taxpayer enters default and management becomes complicated with surcharges that can reach up to 20% on the fee. If you have questions about how the ITP is calculated, in the article what is ITP in the purchase of cars we explain it in detail.
Errors in the chassis number or vehicle details
The VIN (chassis number) is the vehicle's unique identifier. A single incorrectly transcribed character means that the DGT systems do not find the unit and the procedure remains blocked. This error is especially frequent when working with imported cars, where the chassis can have different formats depending on the country of origin.
The same occurs with other vehicle data such as fiscal horsepower, CO₂ emissions or body type. These details determine, among other things, the base of the registration tax. If there is a discrepancy between what is declared and what appears on the technical specifications sheet, the DGT may require additional documentation or reject the application outright.
The way to avoid it is simple: always copy the data directly from the original documents, never from memory or from another system where they may have been entered with previous errors.
Trying to register a car with outstanding charges
A car cannot be transferred or registered if it has associated administrative or legal charges. The most common problems in this regard are:
Active seizures: if the vehicle has a seizure in the name of the previous owner, the DGT blocks any procedure until it is lifted. In the article on how to lift a seizure on a car we explain the process in detail.
Reservation of title: if the car was financed and the financial institution has an active reservation of title, the transfer cannot be carried out without the consent or cancellation of that charge. You can consult how reservation of title works on cars to fully understand this situation.
Expired or failed MOT (ITV): the DGT does not register vehicles that have not passed the corresponding MOT.
Before formalising any purchase, checking the vehicle history with the DGT and, if the transaction warrants it, a CARFAX report avoids surprises at the time of the procedure. From Dealcar, the DGT and CARFAX report queries are integrated into the vehicle file, allowing these issues to be detected before closing the transaction.
Problems with deadlines: who must process and in how much time
Another common mistake is not being clear about who is responsible for managing the registration and within what timeframe. For used vehicles sold between individuals, it is the buyer who must process the change of ownership within 30 business days. In the case of professional dealerships, that deadline also applies from the date of the sale.
When a dealership acts as an intermediary and delays processing the transfer, it can incur traffic fines because the vehicle remains associated with the previous owner. If during that period the car receives a fine or causes an accident, responsibility can fall on whoever appears as the owner in the DGT registry, not on whoever is driving it.
The solution involves having a clear document management process for each transaction: what documents are needed, who collects them, who delivers them to the agency and within what timeframe. The more standardised that flow is, the less room there is for errors.
How to manage sales files to avoid these errors
Most of the errors described have a common denominator: lack of organization in document management. When the vehicle data is in an Excel sheet, the buyer's documents in the email, the contract in a Drive folder and the proof of ITP is with the agency, it is easy for something to get lost or for a piece of data not to match up.
In Dealcar, the sales file centralises all documentation for each transaction in a single place: vehicle data, buyer documents, contract, invoices and the status of each procedure. The goal is for anyone on the team to be able to see, at a glance, what is left to complete before the car can be delivered. This reduces documentation errors and shortens the time between the sale and the actual delivery.
Conclusion
Errors when registering a car are rarely irreversible, but they always cost time and, in many cases, money. Incomplete documentation, unpaid taxes, undetected charges or missed deadlines are the four major problem areas. Detecting them before starting the procedure, not after, makes the difference between a smooth delivery and an operation that becomes unnecessarily complicated.
More than 750 dealerships already use Dealcar
More and more dealerships are using Dealcar to manage the entire buying and selling process in an orderly way: stock, files, contracts, invoicing and DGT procedures from a single system. If you run a dealership and want to reduce administrative errors in each operation, you can schedule a free demo at dealcar.io.
Frequently asked questions
What happens if I make a mistake when entering the chassis number during the registration process?
The DGT will not be able to locate the vehicle in its system and the application will be blocked. The data must be corrected and the documentation resubmitted. If the error is on the original technical specifications sheet, the process may require additional steps with the manufacturer or importer to obtain an official correction.
Can I register a car without having paid the ITP?
No. The settlement of the ITP is a prerequisite for any change of ownership procedure at the DGT. Without proof of payment, the application does not move forward. The deadline to pay it is 30 business days from the signing of the purchase agreement.
Who is responsible for fines if the car is still in the seller's name?
Legally, the registered owner at the DGT is primarily responsible for traffic penalties. If the buyer or the dealership takes time to process the change of ownership, any fine or incident that occurs during that period can be attributed to the previous owner, even if they have sold the car.
How do I know if a car has charges against it before buying it?
You can request it directly from the DGT through a vehicle report, or use services like CARFAX which include legal issues, accident history and mileage consistency. It is an investment that avoids purchases that cannot be transferred later.
How long does the DGT take to process a registration? If all the documentation is correct and taxes are paid, the procedure is usually resolved in a few business days online. If there are issues, the process can drag on for weeks until they are resolved. We explain it to you in more detail in the article "How long does it take to register a car in Spain?".
Registering a car seems like a simple procedure until something goes wrong. A missing document, incorrect data on the form, a tax that has not been settled on time. Any of these errors can paralyse the process for days or weeks, with the vehicle immobilised and the customer waiting.
For dealerships, these delays have a direct cost: the car remains in stock without being in the buyer's name, delivery is delayed and the buying experience deteriorates at the most visible moment. This article reviews the most common mistakes when registering a car, what causes them and what to do to avoid falling into them.
Incomplete or incorrect documentation
The first block of errors has to do with documentation. The DGT requires that all documents to register a car are in order before processing any registration or change of ownership request. A single erroneous field or a document that does not match another can generate an issue that forces you to start the procedure from scratch.
The most problematic documents are usually:
The registration certificate, especially for imported cars where the chassis data may not exactly match those on the Spanish technical specifications sheet.
The reduced technical specifications sheet, mandatory for vehicles coming from another EU country. If the homologation has not been processed correctly, the registration plate cannot be assigned.
The buyer's ID card or NIF, which must match the purchase agreement details exactly. A misspelled name or incorrect ID number paralyses the file.
The most practical advice here is to check all documents before submitting them, not when the problem has already been detected. If you work with an agency, make sure they receive the complete documentation from the very first submission.
Not paying the ITP or registration tax before processing
One of the most frequent mistakes, especially among private buyers, but which also affects dealerships when they manage the registration on behalf of the customer, is trying to process the change of ownership without having previously settled the corresponding taxes.
For second-hand vehicles, the Property Transfer Tax (ITP) must be paid before submitting the application to the DGT. For new or imported vehicles, the Special Tax on Certain Means of Transport applies, better known as the registration tax. Submitting the application without proof of payment generates an automatic issue.
The deadline to pay the ITP is 30 business days from the date of the sale. Once this period is exceeded, the taxpayer enters default and management becomes complicated with surcharges that can reach up to 20% on the fee. If you have questions about how the ITP is calculated, in the article what is ITP in the purchase of cars we explain it in detail.
Errors in the chassis number or vehicle details
The VIN (chassis number) is the vehicle's unique identifier. A single incorrectly transcribed character means that the DGT systems do not find the unit and the procedure remains blocked. This error is especially frequent when working with imported cars, where the chassis can have different formats depending on the country of origin.
The same occurs with other vehicle data such as fiscal horsepower, CO₂ emissions or body type. These details determine, among other things, the base of the registration tax. If there is a discrepancy between what is declared and what appears on the technical specifications sheet, the DGT may require additional documentation or reject the application outright.
The way to avoid it is simple: always copy the data directly from the original documents, never from memory or from another system where they may have been entered with previous errors.
Trying to register a car with outstanding charges
A car cannot be transferred or registered if it has associated administrative or legal charges. The most common problems in this regard are:
Active seizures: if the vehicle has a seizure in the name of the previous owner, the DGT blocks any procedure until it is lifted. In the article on how to lift a seizure on a car we explain the process in detail.
Reservation of title: if the car was financed and the financial institution has an active reservation of title, the transfer cannot be carried out without the consent or cancellation of that charge. You can consult how reservation of title works on cars to fully understand this situation.
Expired or failed MOT (ITV): the DGT does not register vehicles that have not passed the corresponding MOT.
Before formalising any purchase, checking the vehicle history with the DGT and, if the transaction warrants it, a CARFAX report avoids surprises at the time of the procedure. From Dealcar, the DGT and CARFAX report queries are integrated into the vehicle file, allowing these issues to be detected before closing the transaction.
Problems with deadlines: who must process and in how much time
Another common mistake is not being clear about who is responsible for managing the registration and within what timeframe. For used vehicles sold between individuals, it is the buyer who must process the change of ownership within 30 business days. In the case of professional dealerships, that deadline also applies from the date of the sale.
When a dealership acts as an intermediary and delays processing the transfer, it can incur traffic fines because the vehicle remains associated with the previous owner. If during that period the car receives a fine or causes an accident, responsibility can fall on whoever appears as the owner in the DGT registry, not on whoever is driving it.
The solution involves having a clear document management process for each transaction: what documents are needed, who collects them, who delivers them to the agency and within what timeframe. The more standardised that flow is, the less room there is for errors.
How to manage sales files to avoid these errors
Most of the errors described have a common denominator: lack of organization in document management. When the vehicle data is in an Excel sheet, the buyer's documents in the email, the contract in a Drive folder and the proof of ITP is with the agency, it is easy for something to get lost or for a piece of data not to match up.
In Dealcar, the sales file centralises all documentation for each transaction in a single place: vehicle data, buyer documents, contract, invoices and the status of each procedure. The goal is for anyone on the team to be able to see, at a glance, what is left to complete before the car can be delivered. This reduces documentation errors and shortens the time between the sale and the actual delivery.
Conclusion
Errors when registering a car are rarely irreversible, but they always cost time and, in many cases, money. Incomplete documentation, unpaid taxes, undetected charges or missed deadlines are the four major problem areas. Detecting them before starting the procedure, not after, makes the difference between a smooth delivery and an operation that becomes unnecessarily complicated.
More than 750 dealerships already use Dealcar
More and more dealerships are using Dealcar to manage the entire buying and selling process in an orderly way: stock, files, contracts, invoicing and DGT procedures from a single system. If you run a dealership and want to reduce administrative errors in each operation, you can schedule a free demo at dealcar.io.
Frequently asked questions
What happens if I make a mistake when entering the chassis number during the registration process?
The DGT will not be able to locate the vehicle in its system and the application will be blocked. The data must be corrected and the documentation resubmitted. If the error is on the original technical specifications sheet, the process may require additional steps with the manufacturer or importer to obtain an official correction.
Can I register a car without having paid the ITP?
No. The settlement of the ITP is a prerequisite for any change of ownership procedure at the DGT. Without proof of payment, the application does not move forward. The deadline to pay it is 30 business days from the signing of the purchase agreement.
Who is responsible for fines if the car is still in the seller's name?
Legally, the registered owner at the DGT is primarily responsible for traffic penalties. If the buyer or the dealership takes time to process the change of ownership, any fine or incident that occurs during that period can be attributed to the previous owner, even if they have sold the car.
How do I know if a car has charges against it before buying it?
You can request it directly from the DGT through a vehicle report, or use services like CARFAX which include legal issues, accident history and mileage consistency. It is an investment that avoids purchases that cannot be transferred later.
How long does the DGT take to process a registration? If all the documentation is correct and taxes are paid, the procedure is usually resolved in a few business days online. If there are issues, the process can drag on for weeks until they are resolved. We explain it to you in more detail in the article "How long does it take to register a car in Spain?".
