S3 Bucket Valid Tag error and workaround

Question

Hi  
We are transferring document's from  SharePoint to AWS S3 using a  ETL tool , we are part of the solution , sharing the Author name of the document as  Tags for optimal use of S3 . The issue we are facing is that the name has a first name and second name ,eg .  Key= Name  Value= John,Doe . When we try to tag it , it throws a 403 error . It is probably the comma in the value that is causing it .  I have seen the documentation around this  
https://docs.aws.amazon.com/AmazonS3/latest/API/ErrorResponses.html#S3TaggingErrorCodeList
InvalidTag	
This request contains a tag key or value that isn't valid. Valid characters include the following: [a-zA-Z+-=._:/].
 400 Bad Request	Not supported
My question is if there is a workaround I can pass comma as part of the tags to support our business requirements. A quick reply will really help

re:Post Agent · Answer

Unfortunately, there isn't a direct workaround to use commas in S3 object tag values. The S3 tagging system has specific restrictions on allowed characters for tag values, and commas are not among the permitted characters.

To address your business requirement of including author names with both first and last names as tags, you have a few options:

1. Replace the comma with an allowed character. For example, you could use a hyphen or underscore instead: "John-Doe" or "John_Doe".

2. Combine the first and last names without any separator: "JohnDoe".

3. Use separate tags for first name and last name. For example, Key=FirstName Value=John and Key=LastName Value=Doe.

4. Encode the comma using URL encoding, replacing the comma with "%2C". However, this may make the tags less readable.

When tagging S3 objects, it's important to stick to the allowed characters, which include letters, numbers, spaces, and the following special characters: + - = . _ : /

By adjusting your tagging strategy to work within these constraints, you should be able to avoid the 403 error and successfully tag your S3 objects with author information.  
**Sources**  
[Can we have a bucket name:  \b\-ds.n | AWS re:Post](https://repost.aws/questions/QUNdNhtdBHS0ihQyu-a2FudQ/can-we-have-a-bucket-name-b-ds-n)  
[Can we add more than one tag at the Time of putting an object? | AWS re:Post](https://repost.aws/questions/QUSBlpGIajQ1qXBOnYIP2IHw/can-we-add-more-than-one-tag-at-the-time-of-putting-an-object)

SHAJAM · Answer

Comma is not supported, you need to find an alterative. Either, you can use a different character like '_' instead of comma but this has the disadvantage that you might have '_' in other tags. Alternatively, you can use the object metadata instead of tags. Metadata support ',' in the value. For example, you can set the metadata of the object to
```
Type: User defined
Key: x-amx-meta-auth
Value: Doe,John
```

S3 Bucket Valid Tag error and workaround

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