You are provided an offer or guaranteed offer before you have had a formal interview.
You are asked to pay a fee for visa/immigration, taxes or travel fees etc.
You are asked to interview over Instant Messenger or similar program.
You are guaranteed a work-from-home or remote working position.
You are asked to complete visa application forms or agree to terms and conditions before you have had an interview.
There is an urgency to provide personal information such as address details, date of birth, passport details, etc. very early in the process.
You are called from a mobile phone number, rather than office landline number.
The communication is poorly formatted or contains obvious spelling or grammatical errors.