Selling on Facebook Market Place

Most times the bank transfer will be legitimate, there is always a risk of the fake bank app but as long as money shows in your account then it's fine.

One time I had someone try to recall the bank transfer after leaving with item, but once I showed bank evidence (chat history from buyer, timing) they allowed me to keep the funds. So would recommend holding onto evidence and making sure the buyer has ID that matches their bank account (CCTV may be helpful too)

In terms of fake bank app, I had this once and recognised the app straightaway from Facebook posts. Told the guys who showed up I'd wait whole day for the transfer to land in my account, to come back later once it clears if they wanted They waited for a bit before giving up saying they'd come back, they never did.

Cash on collection remains the safest way, but there are always people with fake notes about so you have to be VERY careful.

Make sure the item is out of reach of the buyer in all circumstances until you are happy with payment, sometimes they will look to distract. Say for example handing you fake notes to count, then grab the item and run when you are not looking. (edited)

Quick check is the hologram, the word changes between the value and 'Pounds' when the note is tilted, e.g. for a £10 note the word changes between the 'Ten' and 'Pounds'
bankofengland.co.uk/ban…tes

Can also use a UV light, the type that is used in shops:
safescan.com/en-…tor