3/6/9 leases, automatic rent receipts and remote signing — for a landlord still working on paper

The problem

Running 3/6/9 commercial leases and residential tenancies by hand means copying Word templates, tracking deadlines from memory, issuing receipts one at a time and chasing signatures. Each rent review means finding the right INSEE index for the right quarter — one wrong index and the review is contestable.

Stack

Services involved

• Custom business applications
• DevOps & infrastructure

What we did

• Compliant lease generation: 3/6/9 commercial lease built from the client's exact template, unfurnished tenancy in the statutory standard-contract format.
• Rent calls with batch sending, and receipts issued automatically on payment.
• Built-in remote signing with a one-time code sent by email — no more meeting up for a signature.
• Daily tracking of INSEE rent indices with automatic catch-up, quarantine of abnormal values, monthly report and scheduler health check.
• Tenant portal with a temporary password and forced change on first login.
• White-label architecture: one codebase serves several brands, each with its own identity.
• 35 automated tests green, timestamped backup before every production release.