1. Don't release payment until you confirmed payment on your mobile app: it's easy to for everyone to operate transactions on their mobile app these days, don't rely on sms alert, values can be altered, you might not get good view of your account balance. Make sure to use transaction history to check amount that came into your account before you release any coin.
In this era, many people don’t use SMS alert to confirm payment but I know some people may still be using that. Some may not be close to their mobile phone to access their bank app and tend to use SMS alert but that is a very bad practice now that fake SMS alerts can be sent and you won’t know. Those that make use of FinTech banks and make use of SMS alerts will be more prone to be tricked by scammers since most of these FinTech banks make use of phone number as the account number. So if you’ve used your phone number as your account number on your exchange P2P, don’t activate SMS alerts but rather make use of bank mobile apps to confirm payment.
2. Report traders that engage in fraudulent schemes and give negative reviews for begging: I do ignore traders that try to send me incomplete payment after sending the remaining amount or when they try to beg for money. However, I personally feel like it's because they are been ignored and actions are not taken against them is why they keep coming back. If for every trade they try to beg or scam and they are getting negative reviews, they will stop one day because their ratings will reduce.
I have only encountered this once but I was lenient not to give a negative review on the merchant because he begged me not to and said that’s not his ways, that it was just a tip they ask for and if you don’t wish you can let it be. Although he didn’t tell me that before sending incomplete payment. Next time I come across any merchant with such fraudulent act, I’ll gladly give them a negative review because it’s more persistent than before and the complaint is getting more and more. I now believe that they know what they’re doing and the only way to penalize them is to give them negative review. I think it’s going to reduce with that action taken against them.