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WHMCS Client Custom Fields

  1. Login into your WHMCS admin area
  2. Go to Setup -> Custom Client Fields
  3. Create two custom fields as follows:

Client Custom Fields

These are needed for some payment methods. The yellow marked parts must be identical. For the gender options/validation, you might also use any form of translation you wish. You will need the IDs of those custom fields. In order to get them, hover to a "Translate" button and check the link. At the end of it there is the id parameter.