prady22,
We can all try and help but it is useless without sufficient information.
As noted it is not a requirement to have welders name or number on the film - unless it is for welder qualification and then it must be on there and it must be correct.
The important thing is the project specifications which you haven't mentioned.
Does it state in the project specifications or contract documents - no corrections on films ?
If it doesn't then ask the client to provide reference as to where it states in the applicable code that you cannot do what you have done.
Very expensive exercise to reshoot welds just because the client doesn't like something,
Cheers,
Shane