What a DPA is
A Data Processing Agreement is the contract that governs what a supplier can do with personal data you entrust to them. Whenever you use a tool or partner that processes your customers' data, GDPR requires one.
The controller decides why and how data is used; the processor acts on their instructions. The DPA writes those roles down, so responsibility is never ambiguous if something goes wrong.
What it should cover
A solid DPA sets out the scope and purpose of processing, security measures, how sub-processors are handled, where data is stored, breach notification, and what happens to data when the relationship ends.
These clauses are not boilerplate to skim. Details like data residency and deletion on termination directly affect your own compliance position.
Why it matters to you
Every SaaS tool, hosting provider, and automation partner in your stack should have a DPA in place. Missing agreements are a common gap that surfaces awkwardly during due diligence or an incident.
When we build systems that touch personal data, we make sure the processing relationships are documented properly, so your data-handling chain holds up to scrutiny rather than falling apart under a client's audit.