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Preposition after verb

Attest to, by, in, from or at?

Attest to is the standard pattern meaning show, confirm, or serve as evidence. Other prepositions may appear in separate structures but are not the usual complement after attest.

Quick answer

Use attest to for evidence or confirmation

Attest to means confirm, prove, or show that something is true. Attest by, attest in, attest from, and attest at are not standard verb-preposition patterns for this meaning, though by may appear in passive or method expressions.

The results attest to the success of the programme
Her experience attest to her expertise
These records attest to the company's growth

Choose the pattern by meaning

These forms are not interchangeable. Choose the construction by meaning, not by which preposition appears most often.

1
attest to + fact

Showing evidence of something

Use attest to when something proves or confirms a fact.

The documents attest to his identity
2
attest to + quality

Confirming a quality or ability

This pattern is common when praising skill, character, or effectiveness.

Many clients can attest to her professionalism
3
attest by + method

Describing a method in formal contexts

By may introduce the means of attesting, but it is not the normal complement after attest.

The contract was attested by signature
4
attest in + document

Referring to location within a document

In can introduce the place where a statement appears.

The error is attested in the official report

See the difference in context

The same subject can take different constructions because each sentence answers a different question.

Construction
Example
Meaning
attest to
Witnesses attested to the accuracy of the statement.
Standard pattern meaning confirm or provide evidence.
attest by
The form was attested by two witnesses.
By introduces the agent in a passive structure.
attest in
The practice is attested in ancient texts.
In introduces the place or source where evidence appears.
attest from
Not standard: The records attest from his experience.
From is not normally used directly after attest in this meaning.
attest at
Not standard: She attested at his honesty.
At is not an idiomatic complement after attest.

Common mistakes

Some combinations appear in real text but do not mean what learners often assume.

Using the wrong preposition after attest

Use attest to when meaning confirm or prove.

✕ The data attest at the problem. ✓ The data attest to the problem.

Adding from after attest

From does not normally follow attest directly.

✕ These letters attest from his loyalty. ✓ These letters attest to his loyalty.

Quick practice

Choose the expression that matches the intended meaning.

1. The evidence clearly attests ___ his innocence.
2. The agreement was attested ___ a notary.
3. The custom is attested ___ several historical records.

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Frequently asked questions

What does attest to mean?

It means confirm, prove, or show evidence of something.

Is attest by correct?

Usually by appears in passive expressions such as attested by a witness, not as the main complement after attest.

Can attest be used without to?

Yes, especially in legal English, but attest to is the most common pattern for confirming facts or qualities.

abandon, by, abandon, in "abduct by", "abduct in" or "abduct from"? abide by, in, with, to or on? "abolish in" or "abolish by"? "abound in" or "abound with"? "absorb by", "absorb into" or "absorb in"? "accelerate by", "accelerate to" or "accelerate in"? accentuate by, with, in or under? accept by, in, as, for or into? "accommodate in", "accommodate for" or "accommodate to"? "accomplish by" or "accomplish in"? "accord to" or "accord with"?

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