On this page
- 1. Do you pay for duplicates and bad lines?
- 2. Do you see the exact price before you pay?
- 3. Pay per number or a subscription?
- 4. What is the minimum and maximum per order?
- 5. Which formats does it accept?
- 6. Does it ask for your WhatsApp account?
- 7. What exactly do the results tell you?
- 8. What happens to your file afterwards?
- 9. How do you pay, and what if an order fails?
- 10. Can you reach a person?
- A checklist you can copy
- How PWF Platform answers these questions
- Questions people ask
There are many websites that check phone numbers for WhatsApp, and from the outside they look alike: upload a list, get a result. The differences show up later, in the price you really pay, in what happens to your file and in what the result actually means. These ten questions help you compare checkers before you pay, whichever one you choose
1. Do you pay for duplicates and bad lines?
Real lists are messy. Exports from a CRM, a form or a spreadsheet often hold the same number twice, empty lines, text and numbers from other countries. Ask whether these are removed before the price is calculated, or whether every line in the file is charged
Look for a checker that counts unique, valid numbers first and charges only those
2. Do you see the exact price before you pay?
A price per million is only half the answer. What matters is the amount for your file. Ask whether you see the final count and the final amount before the order starts, or only after
Look for an exact amount on the screen before you confirm, with nothing added afterwards
3. Pay per number or a subscription?
Some services sell monthly plans with a number limit, others charge per number from a balance. If you check lists now and then, a subscription can cost you money in the months you do not use it
Look for a model that fits how often you check. Pay per number is simpler if your volume changes from month to month
4. What is the minimum and maximum per order?
Most checkers have a minimum file and a maximum per order. If your lists are small, a high minimum means paying for numbers you do not have. If they are large, a low maximum means splitting your file many times
Look for limits that fit the size of the lists you really have
5. Which formats does it accept?
Ask whether you can upload a plain .txt or .csv file, whether it cleans up spaces, dashes, brackets and a leading + for you, and how it treats numbers written in a local format with a leading 0. A checker that rejects half your file over formatting costs you time
Look for clear rules on the number format, and cleaning of the small things done for you. Our guide to the international phone number format shows how numbers should be written
6. Does it ask for your WhatsApp account?
This is the most important question for your own safety. A checker that asks you to scan a QR code or connect your WhatsApp account runs the checks through your number. Unusual activity on an account can lead to limits
Look for a checker where you only upload a file and never connect any WhatsApp, Apple or Facebook account
7. What exactly do the results tell you?
A good checker is clear about what "registered" means and what it does not mean. A registered number has a WhatsApp account. That does not tell you who uses the number, whether they read messages, or that your message will be delivered. Be careful with services that promise more than that
Look for plain result files, and an honest explanation of what each one means
8. What happens to your file afterwards?
Your list is your data and often your customers' data. Ask how long the uploaded file and the results are kept, whether they are deleted, and whether that is written in a privacy policy you can read
Look for a stated retention time, deletion after it, and a privacy policy that says so
9. How do you pay, and what if an order fails?
Look at the payment methods, the minimum top-up and what happens when something goes wrong. If an order cannot be finished, does the money come back to your balance automatically, or do you have to ask?
Look for a clear rule for failed orders, written down before you pay
10. Can you reach a person?
When an order looks stuck or a result looks odd, you want an answer from a person. Check whether there is a support chat or another real channel, not just a contact form
Look for a support channel that answers, and a way to follow the progress of your order yourself
A checklist you can copy
| Question | Good answer |
|---|---|
| Duplicates and bad lines charged? | No, removed before the price |
| Exact price before paying? | Yes, for your file |
| Subscription? | Optional or none, pay per number |
| Minimum and maximum per order | Fit your real lists |
| Formats | .txt and .csv, small format mistakes cleaned up |
| Your WhatsApp account needed? | No, you only upload a file |
| Result meaning explained? | Yes, including what it does not tell you |
| File retention | Stated, then deleted |
| Failed orders | Money back to your balance |
| Support | A real person you can reach |
How PWF Platform answers these questions
We built PWF Platform around the same questions, so here are our own answers:
| Question | PWF Platform |
|---|---|
| Duplicates and bad lines | Removed first and not charged, together with numbers from other countries |
| Price | The exact amount for your file shows before you place the order. Every check is on the pricing page |
| Payment model | Pay per unique number from a prepaid EUR balance, with no subscription. The balance does not expire |
| Limits | Up to 2,000,000 numbers per order. The minimum depends on the check, from 500 numbers |
| Formats | .txt or .csv, one number per line with the country code. A leading + or 00, spaces, dashes and brackets are removed for you |
| Your accounts | You never connect a WhatsApp, Apple or Facebook account |
| Results | Two files, Registered and Not registered, with the meaning explained on each check's page |
| Your files | Kept in your account for 7 days after the check finishes, then deleted |
| Failed orders | The full amount goes back to your balance |
| Support | A support chat on the website and in your account, and our support team on Telegram |
Not sure which WhatsApp check fits your list? Read Quick, Standard or Detailed
Questions people ask
Is a cheaper checker always worse?
No. Price depends on how deep the check goes. A fast, low-cost check is often the right first step on a big raw list. What matters is that you know what you pay for and what the result means
Can a checker tell me if a number is active?
A WhatsApp check tells you whether a number has a WhatsApp account. It cannot tell you who uses it or whether they will read your message. Be careful with any service that promises that
Is it legal to check phone numbers?
Only check numbers you are allowed to work with. Checking a number is not permission to message it: in the EU and many other places, marketing messages usually need the person's consent
