Falsify documents, making no allowances (5)

I believe the answer is:

rigid

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'making no allowances' is the definition.
I can't judge whether this definition defines the answer.

'falsify documents' is the wordplay.
'falsify' becomes 'rig'.
'documents' becomes 'ID' (identification).
'rig'+'id'='RIGID'

Can you help me to learn more?

(Other definitions for rigid that I've seen before include "Stiff, unyielding" , "Not flexible" , "Firmly fixed" , "not relaxing" , "Stiff, unmoving" .)

I've seen this clue in The Guardian.

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