Hello, i am using transaction policy to prevent users from adding certain words on chatter post and comments by comparing with a list of words stored on object Banned Words:Code:global class TP02_BWChatterPostPolicyCondition implements TxnSecurity.PolicyCondition { //private string getQueryString() { //return 'SELECT Word__c FROM Banned_Word__c LIMIT 50000'; //} public boolean evaluate(TxnSecurity.Event event) { String body = event.data.get('Body'); Boolean o; Boolean searchResults; Banned_Word__c[] banwrds = [SELECT Word__c FROM Banned_Word__c lIMIT 10000]); // Each loop processes 200 items for(Integer i = 0; i<banwrds.size(); i++){ Pattern pattern = Pattern.compile('.*\\b' + banwrds[i].Word__c + '\\b.*'); Matcher m = pattern.matcher(body); if(m.find() > 0){ searchResults = true; } else{ searchResults = false; } } return searchResults; }}