Check the next action, not just the communication channel
Fictional example: Samira buys a used scarf. The seller wants to send an extra detail photograph through a messaging app. Soon afterwards, he also suggests paying outside the marketplace. Samira treats these as two separate requests: a photo provides information, while a new payment route changes the transaction. She asks whether the purchase can still use the agreed marketplace feature. The answer helps her make a deliberate decision instead of following the conversation automatically.
What support does this marketplace actually provide?
Read the help for the specific marketplace you are using. Some services only introduce people; others manage payment and disputes within their own system. Check which steps are required for any protection to apply. A private conversation, purchase confirmation and payment may be treated differently. Do not rely on a broad claim that you are “insured through the platform”. The conditions need to match your particular purchase and the process you are choosing to use.
Keep important agreements together
Summarise the item description, known defects, total price and delivery agreement in the marketplace chat. This is particularly helpful after a telephone conversation. Write only what was actually agreed and ask the other person to clarify anything uncertain. Save relevant messages with their dates, rather than collecting unnecessary private details from the person’s entire profile. You need understandable records of this transaction, not an extensive personal file about the seller or their family.
Protect contact details separately from payment information
Consider whether your private telephone number is actually needed. If you share it, later messages may arrive outside the marketplace. Treat links there with the same care as links anywhere else. Do not share login codes or install an alleged delivery or payout app at an unfamiliar person’s instruction. A familiar profile photograph or the item name already discussed does not make a subsequent request for payment genuine. Check the action through your own account.
A clear reply can reduce pressure
You can politely say: “I would like to keep the purchase agreement and payment in the official process. Please send any further details here.” If the person refuses, you do not have to continue. An unusual channel change is a reason to check, not a certain diagnosis of the person’s intentions. If you have specific concerns about fraud, use the marketplace reporting function and keep relevant evidence. Insults or public copies of identity documents do not resolve the problem.
Your checklist
The checkboxes are for your own reference. No entries are sent to us. To keep a copy, print the page or save it as a PDF using your browser menu.
Common questions
Can I phone someone to arrange collection?
A call may be useful for agreeing a time. Record important changes afterwards in the original sale thread and check any additional platform rules. The contact method does not replace inspecting the item or understanding the payment process.
Are all external links dangerous?
No, but they take you outside the familiar context. For signing in, paying or contacting support, open the service through your own known route. A link supplied by the other person does not prove that the destination belongs to the provider.
Which agreements should I keep on the platform?
Keep a clear record of the item, agreed price, condition and delivery or collection arrangements. After a call, summarise important agreements there factually. Retain necessary evidence without unnecessary personal details. The exact scope of any protection programme depends on its terms.
Sources and further information
Primary sources from public authorities, consumer organisations and providers. A source may be in another language; follow the guidance that applies to your service and where you live.
- FTC: Buying From an Online MarketplaceSource review date:
- BACS: Kleinanzeigen-Phishing und Wechsel in MessengerSource review date:
