Does PQR need thirdparty endorement?

Hello,

I would like to ask about procedure/PQR:
Who is required endorement the PQR by thirdparty? and which standard are required?

Thanks Bro,

The PQR shall be certified accurate by the organization .
The organization may not subcontract the certification function . This certification is intended to be the organization 's verification that the information in the PQR is a true
record of the variables that were used during the welding of the test coupon and that the resulting tensile , bend , or macro (as requ ired) test results are in compliance with
Section IX.

QW200.2 ASME sec9

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recommend to invite 3rd to verify and endorse document.
base on your burget.

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Which one could invite to witness?

Famous third parties: DNV-GL, LR, BV.