What is the best way to judge clients credibility?

Credibility can be judged by historical company's transactions and its ability to settle of all related liabilities on due time, without any delay.

IT HAS TO BE JUDGED THROUGH THEIR PAST RECORDS

By their repaying compliance

BY scrutinizing customer's KYC and Credit report

Every Company credibility can be check by following basic steps:

1. Check its registration/License in relevant government department.

2. Go through their taxation documents.

3. For how long they been in relevant field or industry.

4. Contact  their partners or customers for feedback.

Scrutinize the bank statement

The best way to judge clients credibility is to ascertain the following:

• you look at their part records
• if they are well prepared.
• they talk about their experience in a relevant way (not a show off way)
• they look confident, but not too much 

check for the company's credit rating.

By checking his/ her previous record, and current status of the client. 

There is a golden rule that says: "don't judge a book by it's cover".  Credibility can only be judged by time.