# Assay, Fundação Butantan

> Assay checks each service sheet at Fundação Butantan against its invoice, order and contract before a manager approves the payment, and cites the passage behind every check.

Source: https://www.homodeus.co/assay | Language: en | Updated: 2026-10-30

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### The ask

Fundação Butantan approves each supplier payment by hand, one at a time. Someone checks the invoice against the purchase order and the contract behind it, writes the justification, and a manager signs. It took one person three to four days every month, and one weekend the queue hit 114 payments waiting.

## A perfect invoice can still be the wrong payment.

### The invoice

It arrives as a PDF, a phone photo or a scan, and it has to match the purchase order and every earlier invoice billed against it.

### The contract

The real question sits one step further back. Is this supplier still under contract, and how much of that contract is already spent? The invoice never says.

## Every check points to the exact line it trusts.

### It reads the paper

The agent reads every document and pulls each number together with the exact sentence it came from. If it cannot find that sentence, the payment goes to a person. It never guesses.

### It checks the money

The arithmetic is done by exact calculation, never guessed by the AI. The contract is checked the same way: the right supplier, still under contract, and the budget not already spent.

Four invoices passed every check and still failed on the contract behind them.

## The manager still decides.

### No new tool

It works inside the files Butantan already keeps and prepares the decision there, so nobody has to learn a new system.

### The desk in minutes

What took a person three to four days every month, the agent now does in minutes. The manager still makes the call; the agent hands over the recommendation with the exact line behind every number.

## Outcome

The weekend that once stacked up 114 approvals is a five-minute review. The manager still signs. Now every payment arrives already checked, with the exact line behind each number.

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