Final answer:
The length of time signatures must be kept on file after a claim has been submitted is determined by state laws or organizational guidelines, and can vary widely. For ballot measures specifically, states have different signature gathering periods, but this does not directly inform on signature retention periods.
Step-by-step explanation:
The question on how long signatures must be kept on file after a claim has been submitted involves understanding specific retention policies, which can vary based on jurisdiction and the type of claim. In the context of petitions for ballot measures, as mentioned in the reference information, signature collection is a critical step and time limits apply. States like California may have deadlines such as 150 days for signature gathering, whereas Arizona allows up to two years. These are examples of the time given to collect signatures, but they do not directly address the retention period after submission.
For actual retention periods of signatures after claim submission, one would need to consult the specific state laws or organization guidelines that apply to the claim in question. These would include election laws for signatures related to ballot measures or healthcare laws for medical claim signatures. Generally, these policies require maintaining signatures for a period that could range from a few years to several years, to ensure traceability and for potential audits or legal processes that could arise.