Odoo Inter-Company Invoice Error — Multi-Company Transaction Failures Fix

Inter-Company Invoice Errors

When using Odoo's multi-company features with inter-company transactions:

UserError: You cannot create an invoice for another company.

AccessError: You are not allowed to access documents of company 'Company B'.

ValidationError: The inter-company invoice could not be created.
Missing partner mapping for company 'Company A' in company 'Company B'.

UserError: No inter-company rule found for this transaction.

Understanding Inter-Company in Odoo

Odoo can automatically generate corresponding documents between companies:

• Sale order in Company A → Purchase order in Company B
• Invoice in Company A → Vendor bill in Company B
• This requires the inter-company rules module and proper configuration

Fix 1: Install and Configure Inter-Company Rules

# Install the module:
# Apps > search "Inter Company Rules" > Install
# Module name: inter_company_rules

# Configure rules:
# Settings > General Settings > Multi Companies
# For each company pair, set:
# - "Inter-Company Transactions" → Enabled
# - Rule type: "Synchronize Sales/Purchase Orders" or "Invoice/Bill"

# Via Settings on each company:
# Settings > Companies > select company
# Inter-Company tab:
#   - Rule: "Create corresponding invoice/bill"
#   - Warehouse: select default warehouse for purchase orders

Fix 2: Partner Mapping

# Each company must be represented as a Partner in the other company

# Company A must have Company B as a partner (vendor/supplier)
# Company B must have Company A as a partner (customer)

# Check partner mapping:
# Contacts > search for "Company A" in Company B context
# Contacts > search for "Company B" in Company A context

# If missing, create the partner:
# 1. Switch to Company B
# 2. Create a new contact "Company A"
# 3. Set "Is a Company" = True
# 4. Link it: Company field → Company A

# The link is via res_company.partner_id:
sudo -u postgres psql -d mydb -c "
  SELECT rc.name, rp.name as partner_name, rp.id as partner_id
  FROM res_company rc
  JOIN res_partner rp ON rc.partner_id = rp.id;
"

Fix 3: User Must Belong to Both Companies

# The user creating the transaction must have access to both companies

# Check user's allowed companies:
# Settings > Users > select user > "Allowed Companies"

# The user needs at least read access in both companies
# For automatic inter-company transactions:
# The inter-company user (often admin) needs full access

# Set the inter-company user:
# Settings > Companies > Company A > Inter-Company tab
# "Responsible User" → select a user with access to both companies

Fix 4: Wrong Company Context

# Error: creating invoice in wrong company context

# In custom code, ensure correct company context:
with_company_b = self.env['account.move'].with_company(company_b)
invoice = with_company_b.create({
    'partner_id': company_a_partner_id,
    'move_type': 'in_invoice',
    'company_id': company_b.id,  # Explicit company
})

# Common mistake: not switching company context
# The env.company might still be Company A when creating in Company B

Fix 5: Chart of Accounts per Company

# Each company must have its own chart of accounts
# Inter-company entries use each company's respective accounts

# Check accounts exist in both companies:
sudo -u postgres psql -d mydb -c "
  SELECT rc.name, COUNT(aa.id) as accounts
  FROM res_company rc
  LEFT JOIN account_account aa ON aa.company_id = rc.id
  GROUP BY rc.name;
"

# If a company has no accounts, install a chart:
# Switch to that company > Accounting > Settings > Fiscal Localization

Fix 6: Tax and Fiscal Position Mapping

# Inter-company invoices need correct tax treatment
# Company A's sale tax may differ from Company B's purchase tax

# Configure fiscal positions for inter-company:
# Accounting > Configuration > Fiscal Positions
# Create a fiscal position for inter-company transactions
# Map: Sale Tax (Company A) → Purchase Tax (Company B)

# Set this fiscal position on the inter-company partner:
# Contacts > Company B partner > Sales & Purchase tab
# Fiscal Position → Inter-Company

Fix 7: Debugging Inter-Company Transactions

# Enable logging for inter-company:
# In odoo.conf:
log_handler = odoo.addons.inter_company_rules:DEBUG

# Check the automatic transaction log:
# Each company's partner should show linked documents
# Company A: Sale Order SO001 → Company B: Purchase Order PO001

# Verify the rule is triggering:
# Check if the scheduled action runs:
# Settings > Technical > Scheduled Actions > "Inter Company Rules"

Prevention

DeployMonkey's AI agent configures inter-company rules, partner mappings, and fiscal positions automatically for multi-company setups. The agent validates cross-company transaction flows before activation.