Economy · #7 of 26 · Since 2007
Tax ID on every receipt (CPF na nota)
The question that ends every purchase in Brazil. In Portugal, they ask for your taxpayer number. Everywhere else, they ask if you want a bag.
Jabuticaba Index®
89%
Plausibility range: 89%
Evidence grade. Computed from source types: from A (official and academic data) to D (editorial judgment). It does not change the index.
01What exactly is being measured
Routine request for the customer's CPF (taxpayer ID) to be printed on retail receipts.
02Context
03Where else it exists
- Local presence(Marginal → Widespread)
- Exported from Brazil(Marginal → Widespread)
- Brazil
- Absent (checked)
- No data
Equal Earth projection. Places with uncertain presence take the color of the highest possible level; the table shows the full range.
Place (1)
| Place | Presence | Weight | Sources |
|---|---|---|---|
| Portugal | Widespread | 1 | [2] |
| Presence abroad | 1 | ||
04How we got this number
- Presence abroad
Sum of each place's weight: widespread = 1, regional = 0.5, marginal = 0.1. Where it only exists as a Brazilian export, the weight is multiplied by 0.5.
- 1
- Exclusivity E
From 0 (exists everywhere) to 1 (only in Brazil), on a log scale.
- 0.85
- Intensity I
How much more common it is in Brazil than in the other places where it exists.
Routine in almost all Brazilian retail (fictional data). [1]
- 2 of 4
- Rarity coefficient R
R = E + 0.5 × (I ÷ 4) × (1 − E)
R = 0.85 + 0.5 × (2 ÷ 4) × (1 − 0.85) = 0.89
- 0.89
- Jabuticaba Index®
- 89%
Not part of the score
How aware Brazilians are that this is rare abroad.
Nobody notices it is unusual. editorial judgment
0 of 4
05Sources
- [1]
Decreto Fictício nº 0.000, de 1º de abril de 2020
Diário Oficial Imaginário · Apr 1, 2020 · Official document · in Portuguese
example.org/fictional-decree · accessed Sep 25, 2026
- [2]
Brazilians Surprised Again
The Example Gazette · Jan 15, 2026 · News
example.org/fictional-gazette · accessed Sep 25, 2026
Last reviewed Sep 25, 2026 · Methodology v0.2