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Last reviewed: 6 July 2026
V55/5 form · Box 66
Cryptographic Hash
What goes in box 66
Box 66 of the DVLA V55/5 form is for cryptographic hash.
Take this from the Certificate of Conformity (if shown) — enter the first 8 characters only. Leave blank if it's not shown.
What to enter
| Field | Type | Required? |
|---|---|---|
Cryptographic Hash Take this from the Certificate of Conformity (if shown) — enter the first 8 characters only. Leave blank if it's not shown. | text | Optional |
Source
This page is generated from the same field definitions our V55/5 tool validates against, mapped to the official DVLA guidance.
V355/5 official guidance (GOV.UK)v55-5.com is an independent service and is not affiliated with the DVLA.
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