Customer credit limits management

Good day

I am trying to find a place to define a customer credit limit, as well as to determine how it will be used on the sales process to place a sales order on credit hold, and prevent the sales order to be shipped if the customer is in arrears or exceeded available credit.

Do these exist?

Maybe you want to take a look to sale credit limit module.

Thanks

Is this a standard module?

Yes. It is a standard module.

I will recomend having a look at the account_credit_limit and the sale_credit_limit documentation to understand hoe the credit limits are managed in Tryton.