"We signed it over WhatsApp, we're covered" — and why you might not be
The scene is always the same. You wrap a session, there are three people on the track, someone pulls out their phone and you sign a split sheet: 40 / 40 / 20. Everyone's happy. Months later, when the royalties arrive —or when the dispute does— you find out that the document you thought was bulletproof doesn't say, in your jurisdiction, what you thought it said.
The problem isn't the split sheet. It's that almost everything written about split sheets assumes you live in the United States. And copyright is not harmonized globally. There's a wide gap between common law (U.S., U.K.) and civil law (Spain and much of Latin America: Mexico, Colombia, Argentina…). What makes an ownership split valid and, above all, enforceable changes depending on where you are.
If you already know what a split sheet is, skip ahead. If not, start with What Is a Split Sheet and Why Every Producer Needs One.
1. The default rule isn't the same everywhere
A split sheet exists, fundamentally, to replace the "silent rule" that applies when there's no agreement. The uncomfortable detail is that this silent rule differs by country.
In the United States, when several people create a joint work, copyright law makes them co-owners in equal shares, regardless of who contributed more. Three co-authors = 33 / 33 / 33, even if one did 80% of the song. Each co-owner can also license the work on their own, accounting to the others.
In Spain, the Intellectual Property Law (LPI) governs works of collaboration in Article 7: the rights belong to all co-authors, but to publish or modify the work you need the consent of all of them, and anything unaddressed falls under co-ownership rules. In other words: the decision-making regime is unanimity, not "everyone does their own thing."
The practical consequence: a split sheet drafted with U.S. logic may take for granted things —unilateral licensing, automatic splits— that work differently in your country.
2. Proof of authorship is not the same as an assignment of rights
This is the misunderstanding that costs the most money.
A split sheet is, in essence, evidence: it establishes who contributed what and in what percentage. That's exactly what you need to register the work with your society (SGAE, ASCAP, BMI…) with the correct splits.
But if what you want is for a publisher to administer the work, for a co-author to assign their share, or to divide who manages the rights, that is no longer "evidence": it's an assignment or mandate. And in Spain, any assignment of rights must be made in writing (Article 45 LPI), with specific requirements on scope, duration and territory. An informal split sheet signed in two minutes may fail to meet those requirements — and then the "assignment" you thought you'd agreed simply doesn't exist.
That's why TuneRegistry points out that a split sheet and a collaboration agreement are different documents, and that serious collaborations should have both. The split sheet sets the percentages; the agreement sets who administers, how accounting works, and what happens if someone licenses the work.
3. Moral rights can't be waived under civil law
Many U.S. templates include waiver-of-moral-rights or work-for-hire clauses. Under civil law, much of that language is null and void.
In Spain, Article 14 of the LPI establishes that an author's moral rights —recognition of authorship, respect for the work's integrity— are inalienable and cannot be waived. They can't be sold or signed away, no matter what a document says. If you copy a U.S. template verbatim, you're putting clauses into your split sheet that, where you live, are worthless — and that can muddy the interpretation of the rest of the document.
4. "Work for hire": the producer who thinks they have no rights (but does)
In the United States, under the work-for-hire doctrine, whoever commissions the work can be legally considered its "author." Under civil law, by contrast, the author is always the natural person who creates. You can't "buy authorship"; at most you can acquire certain economic rights, in writing and with limits.
This cuts both ways:
We go deeper into the Spanish case in A Music Producer's Rights in Spain.
5. The registration that actually moves the needle (and also changes by country)
A split sheet doesn't replace official registration; it feeds it. And registration doesn't work the same everywhere either.
In Spain there's the Intellectual Property Registry. It isn't mandatory —a work is protected from the moment of its creation— but registering it creates a presumption of authorship and ownership unless proven otherwise: very strong evidence if a dispute ever reaches court.
In the United States, registering with the Copyright Office is effectively a prerequisite to sue for infringement and to claim certain damages. Different logic, different role.
The split sheet is the documentary basis that makes any of those registrations reflect the correct percentages. Without it, you're registering blind.
Checklist: what makes your split sheet actually valid where you live
How SPLEET protects you
The reason all of this is so easy to get wrong is that most people start from a generic template —and generic, almost always, means American. SPLEET is built for the opposite:
A split sheet shouldn't be a document you sign fast and pray holds up. Document what you've already created, the moment you create it, in a way that survives in your country.
This article is informational and does not constitute legal advice. For your specific case, consult an intellectual property attorney in your jurisdiction.