it had been six months since this claim was filed.

[tufguy]

This claim denied because it had been six months since this claim was filed.

Is it correct " it had been six months since this claim was filed" or "
it had been six months since this claim had been filed"?

 

[emsr2d2]

This claim was denied because it had been six months since this the claim was filed.

Is it correct Are the following correct?

1. It had been six months since this claim was filed. " or "
2. It had been six months since this claim had been filed.

Are you asking about them as standalone sentences (that's the basis on which I capitalised the first word of each one), or are you asking which should be used at the end of your main sentence?

Neither is natural.

The claim was denied because it was filed six months ago. (I don't think this is what you mean but I gave it a try anyway.)
The claim was denied because it was filed [more than] six months after the [medical procedure or whatever it is you're talking about].

We need more context. What was the deadline for the claim to be filed? When was it actually filed? Was it filed too late?

 

[tedmc]

The claim was denied because it was filed late, after the six-month period allowed.

 

[emsr2d2]

The claim was denied because it was filed after the six-month deadline.

A lot of your posts are about insurance claims, and many are about timeframes. You definitely need to learn and use the word "deadline".

 

[tufguy]

Are you asking about them as standalone sentences (that's the basis on which I capitalised the first word of each one), or are you asking which should be used at the end of your main sentence?

Neither is natural.

The claim was denied because it was filed six months ago. (I don't think this is what you mean but I gave it a try anyway.)
The claim was denied because it was filed [more than] six months after the [medical procedure or whatever it is you're talking about].

We need more context. What was the deadline for the claim to be filed? When was it actually filed? Was it filed too late?

I would like to know what needs to be used after since "filed" or "had filed"? I know these are not natural but I was talking about the grammar.

 

[Tarheel]

The claim was denied because it had been six months since the claim was filed.

I assume that you mean that it was after the filing deadline that the claim was filed.