How to send a Bizum without a phone number: real options and limitations

If you use Bizum daily, you've probably wondered more than once if it's possible to send money without knowing the other person's phone number . Whether it's at dinners with friends, secondhand shopping, or paying at a flea market, this question comes up constantly: is there any way to send a Bizum payment without having the recipient's phone number or without them knowing mine?

The reality is that the system is designed precisely to work with the mobile number as the main identifier, but around this idea there are nuances, little tricks and alternatives to pay or collect without sharing the phone , as well as delicate situations: what happens if you send a Bizum to the wrong number, how the law acts if the recipient does not return the money or what options do businesses have to use Bizum without exposing personal data.

Is it possible to send a Bizum payment without knowing the phone number?

The first thing to clarify is that you can't send a Bizum payment to someone without knowing their mobile number . The service works by linking each phone to a bank account, and the bank's app will always ask you to enter or select a number as the payment recipient.

You can choose the recipient from your contacts or by typing the number manually , but in all cases, you need a specific phone number. If you don't know the person's number, or it's not saved on your phone, the transaction simply cannot be completed.

This means that even if you know exactly who you want to pay, without a phone number, sending a Bizum payment is impossible . There's no public search function by name or alias, nor is there a "send to email" option like in other payment systems.

Now, there's a slight twist: if the other person initiates the transaction, you can complete a Bizum payment without ever knowing their number because they'll be the one providing it. Let's take a look.

The “trick” of the money request: paying without knowing the number

A practical way to pay with Bizum without needing the other person's phone number is to have the recipient request money . This way, you simply accept the request, and the system uses the data it already has on file, without showing you the other user's number.

The usual process for the person who is going to receive the money is very simple: open your bank's app and go to the Bizum section , select the "Request money" option, enter your mobile number, the amount you want to receive and confirm the request.

Once you complete these steps, you'll receive a notification or message from your bank indicating that you have a pending payment request through Bizum . From your app, you'll be able to see who sent it (usually their first name and the first few letters of their last name), the amount, and accept or decline the transaction.

By accepting, the money is transferred from your account to the applicant's instantly, and you never have to write down or save their phone number . It's the most convenient option if the other person prefers not to give out their mobile number or wants to keep it private.

However, for this option to work, you must first provide your number to that person , as they will need it to submit the request. In other words, you can pay without ever knowing their number, but they will need yours.

When someone doesn't want to share their phone number

There are situations where a person prefers not to reveal their phone number, either because you barely know each other, because it's a one-off transaction, or because they don't want to mix their personal life with payments or sales . In these cases, the options are limited.

If, in addition to not wanting to share their number, the person also refuses to initiate a money request via Bizum, there is no other way to complete the payment with this system . Bizum does not offer anonymous or alternative methods for sending money without an associated phone number.

In that scenario, you'll only have to resort to other payment methods: cash, traditional bank transfers, or instant transfers if you know the other person's IBAN. Some people feel more comfortable sharing their bank account number than their mobile number, so that might be an acceptable option for both parties.

If you were close but lost touch, you can always try to find their number through social media or by asking friends or family . Ultimately, if someone truly wants your money, they'll have to provide you with some information to make it happen.

However, if the other party refuses to provide a phone number, bank account details, or any traceable method for receiving payment, there's little you can do beyond giving up . There's no way to send them money with Bizum without them at least providing a phone number or generating a request through their bank.

Bizum between individuals vs. payments for businesses

Bizum was created and is primarily intended for payments between individuals: friends, family, roommates … Hence, the phone number is central to the system. But in practice, we're seeing more and more stalls at markets, small shops, and freelancers using Bizum to collect payments for their services.

Imagine a vendor at a flea market who tells you they only accept Bizum. To pay them, they'll usually have to give you their personal mobile number, which is linked to their bank account . When you confirm the payment, you'll see their name (and sometimes their last name initials) on your screen so you can verify you're sending the money to the right person.

The platform itself explains that, although it's common to see it in small shops or street stalls, the standard service is designed for peer-to-peer transactions . When it comes to businesses, shops, or freelancers, Bizum recommends contacting their bank for business-specific solutions.

Banks typically offer Bizum services geared towards online commerce : virtual POS terminals, payment buttons on websites, or integration with payment gateways for online stores. In these cases, the customer is usually assigned a four-digit PIN code that acts as an identifier for online purchases, similar to a "Bizum ID" for online payments.

For in-store payments, the situation is different: apart from specific agreements between large chains and financial institutions, there is usually no standard Bizum system for brick-and-mortar stores . That's why many small businesses use their personal phone numbers, with the privacy risks that this entails.

Privacy and risks of sharing your mobile number when paying

Sharing your phone number with strangers, even for something as innocuous as a one-off sale, is not a trivial matter. With your mobile number and name, a scammer could try to impersonate your bank or a service provider and launch phishing attacks via calls or text messages.

That's why it's important for you, as a user, to understand what data is actually displayed in a Bizum payment. When someone sends you money, they never receive your phone number through the transaction itself . The only thing they'll see is your name and, in some cases, your last name initials as they're registered with the bank.

The system is configured so that even if you send or receive Bizum payments with people you don't know, they can't obtain your phone number simply by checking the transaction data . That information doesn't appear in the app or on the receipt that's generated.

The only way someone could associate a Bizum name with a specific number is if they already have that contact saved in their address book . If the name they see in the transaction matches the one they have saved on their phone, they could identify you, but it's not because they retrieved the number through the platform, but rather through their own contacts.

You should keep this in mind when someone tells you they need your phone number "just to send you a Bizum": that person could then save that number and use it for other purposes , from messaging you to trying to scam you in the future. Giving out your phone number always involves a certain degree of exposure.

Is it possible to find out the phone number of someone who has sent you a Bizum payment?

A very common question is whether it's possible to find out the mobile phone number of someone who has sent us money via Bizum. The answer is clear: there's no way to see the sender's phone number in the bank's app . The system doesn't display this information either on the transaction history screen or in the transaction details.

Normally, when you receive a Bizum payment, you'll see the person's name and, at most, the initials of their last name. This information is intended to help you identify the sender in general terms, but without revealing their full contact information . You won't find their phone number anywhere on the receipt.

The only scenario in which you could associate that name with a specific phone number is if you already have someone with that same name in your contacts . In that case, you can check your contacts to see if it matches, but you're not recovering the phone number from Bizum; you're just using your own existing information.

Furthermore, the name displayed when you receive a payment doesn't depend on how you have the contact saved in your phone, but rather on how it's registered with the bank. It might be shown differently than how you use it (with a middle name, without a surname, with initials, etc.), which further complicates any attempt at tax deductions.

In short, you can rest easy: whoever receives your Bizum payment won't get your phone number just because of that . It's a different matter if you've already given it to them through another channel so they could pay you.

How to send a Bizum payment to someone who is not registered

Another common scenario is sending money to someone who isn't yet registered with Bizum. You might dial the number of a contact who doesn't use the service or who is in your address book but has never registered on the platform.

In these cases, when you confirm the sending, the system doesn't execute the transfer immediately. Instead, Bizum sends an SMS to the recipient informing them that they have money pending , along with instructions on how to register and collect it.

The text message indicates the amount sent and invites the recipient to register for the service through their bank. If the person registers successfully, the money will be transferred to their account instantly , just like any other standard Bizum transaction, without you being charged beforehand.

The important thing is that during this process, the balance doesn't disappear from your account until the other user registers. In other words, you're not sending money that gets "stuck" in limbo ; the transaction is only processed once the recipient completes their registration.

If that person never activates Bizum, after a certain period of time (usually 48 hours) the transaction is automatically canceled and the money remains in your account . It is not lost at any point, nor does it go anywhere if the registration is not completed.

Cancel a Bizum sent to someone who doesn't have it.

As long as the recipient hasn't registered or accepted the payment, you have a small window to cancel a Bizum payment you've sent to an inactive number . This option is only available while the transaction is still pending.

If you realize the mistake right after sending the payment and you know the recipient won't activate Bizum, you can open your bank's app, go to your transaction history or recent Bizum payments, and look for the option to cancel the transaction . Not all banks display this information the same way, but it's usually clearly indicated if the payment is still pending.

Once the recipient registers and accepts the amount, you can no longer reverse the Bizum payment unilaterally . From that moment on, the transfer is complete, and you can only recover the money through the other person's cooperation or, if necessary, through legal channels.

In any case, even if you don't cancel in time and the recipient doesn't register, the money won't leave your account . You'll simply see the transaction expire after the set time and become void, as if it had never been completed.

It's a good idea to periodically check pending transactions if you usually send Bizum to people who don't yet use the platform, to avoid confusion and be clear about which payments have been completed and which are still pending.

What happens if I send a Bizum to the wrong number?

One of the most common mistakes is typing the wrong phone number or selecting the wrong contact and sending a Bizum payment to someone you didn't mean to . Because the transaction is almost instantaneous, there's minimal time to react, and the feeling of being overwhelmed is often significant.

Bizum uses the SEPA instant transfer scheme , meaning the money arrives in the recipient's account within seconds. Therefore, once you've confirmed the transfer, there's no magic button to undo the transaction from within the app.

The first option recommended by both Bizum and banks is a friendly solution: contact the person who received the money . If the number belongs to a real person and they have an active Bizum account, they will likely even see your name next to the transaction details.

You can send them a message politely explaining the mistake and asking them to refund the amount via another Bizum payment . Ideally, you should document the transaction through a verifiable channel, such as WhatsApp or email, to have proof in case you need to explain what happened later.

In many cases, that's the end of it: the person understands it was a mistake and makes the return without further issue . It's only logical when someone receives money from a stranger for no apparent reason.

When the recipient does not want to return the Bizum

If, after contacting the recipient of the wrong Bizum payment, they refuse to return the money, the situation changes. From a legal standpoint, it could be considered a case of misappropriation if the other party keeps money they know doesn't belong to them.

In Spain, this type of conduct is covered by Article 253 of the Penal Code . The severity of the case depends on the amount: it will be a minor offense if the amount is less than 400 euros and a more serious offense if it exceeds that figure, with potentially greater criminal consequences.

For a complaint to have any chance of success, it's essential that you can prove you requested a refund and that the other person refused . That's why it's so important to use written communication (messages, emails) and keep screenshots or logs that clearly show your request and their response.

If the amount is significant and the recipient's refusal is firm, you can always go to the National Police or the Civil Guard to file a complaint , providing all the documents you have: screenshots of the app showing the transaction, conversations, transaction details, etc.

Even so, it's important to be realistic: even following this method, recovering your money isn't guaranteed . That's why the best protection is prevention: carefully checking the number before confirming the transfer and avoiding sending large sums to people you don't trust.

Recommendations for using Bizum safely

Although Bizum is a very convenient and widespread tool, it's worth learning some best practices to minimize risks and problems with your payments . Most of them are just common sense, but they make all the difference.

First, get into the habit of double-checking your phone number at least twice before hitting "Send ," especially if you're typing it by hand. A single wrong digit can cause you trouble and a lengthy process to try and recover it.

Whenever possible, check the confirmation screen: the app usually displays the name of the person associated with that number . If it doesn't look right, if you see a strange name or something different from what you expected, stop the transaction and check again.

Avoid sharing your phone number carelessly, especially in public or with strangers. If you plan to use Bizum for business or professional purposes, consider having a dedicated line for payments so you don't expose your personal number to everyone.

Finally, remember that if someone asks for your mobile number or sends you links or messages "on behalf of your bank" to confirm a Bizum payment, be suspicious and contact your bank directly through official channels. The combination of phone calls and Bizum is also fertile ground for scam attempts.

With all of the above in mind, it's easier to understand why Bizum revolves around the phone number and why there's no magic formula for sending money without knowing it: the system prioritizes simplicity and user privacy , allowing shortcuts like requesting money, protecting access to the sender's mobile phone, returning funds if the recipient doesn't register, and always offering the possibility of taking legal action if someone keeps a payment by mistake, so you can continue using the tool with confidence in your daily life.