To redact most numbers, like Social Security numbers, use three midline ellipses [• • •].

You can use this format across typefaces and platforms:

Place two regular spaces before the first midline ellipse.
Then add a thin space between each midline ellipse and after the final one.

When to use 3 ellipses

Credit and debit card data must be redacted using four midline ellipses [• • • •].

When to use 4 ellipses

Midline ellipses [• • •] are bulleted characters that partially hide sensitive data. They indicate when a number, such as a credit card or Social Security number, is not entirely visible.

University of Michigan - Ann Arbor

Data redaction and truncation refers to how to represent truncated numbers and disguise sensitive data.

Data redaction

Redacting numbers

Baseline ellipses [...] represent letters, words, or phrases that aren’t shown. They also represent when a name or email address is only partially visible.

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