Payroll Odoo (version 10):

def _get_partner_id(self, credit_account):

        """ Get partner_id of slip line to use in account_move_line """

        # use partner of salary rule or fallback on employee's address

        register_partner_id = self.salary_rule_id.register_id.partner_id

        partner_id = register_partner_id.id or self.slip_id.employee_id.address_home_id.id

        if credit_account:

                if register_partner_id or self.salary_rule_id.account_credit.internal_type in ('receivable', 'payable'):

                        return partner_id

         else:

                 if register_partner_id or self.salary_rule_id.account_debit.internal_type in ('receivable', 'payable'):

                        return partner_id

         return False

I checked HR Payroll Account and HR Payroll Module.

- from where partner_id in hr.contribution.register set?

if partner_id will not set than for above method we cant get partner account in any case. So always Adjustment Account entry for Payslip will be generate.

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if we take partner_id  instead of register_partner_id in condition than it will work.

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Please suggest if there is any functional link or configuration.

Thanks in advance.