The CARPA test is a tool to check the reliability of a source.
Currency: the timeliness of the information
How recent is the information?
Can you locate a date when the page(s) were written/created/updated?
Based on your topic, is the information current enough?
Authority: the source of the information
Can you determine who the author/creator is? is there a way to contact them?
What are their credentials (education, affiliation, experience, etc.)?
Who is the publisher or sponsor of the site? Are they reputable?
Reliability: importance of the information
What kind of information is included in the Web site?
Is the content primarily fact, or opinion? Is the information balanced, or biased?
Does the author provide references for quotations and data?
If there are links, do they work?
Purpose: the reason the information exists
What's the intent of the Web site (to persuade, to sell you something, etc.)?
What is the domain (.edu, .org, .com, etc.)?
Are there ads on the Web site?
How do they relate to the topic being covered (e.g., an ad for ammunition next to an article about firearms legislation)?
Is the author presenting fact, or opinion? Who might benefit from a reader believing this Web site?
Based on the writing style, who is the intended audience?
Accuracy: the reliability, truthfulness, and correctness of the information
Is it accurate? Is it supported by evidence?
Is the information balanced or biased?
Was it peer-reviewed?
Can you verify the information from another reliable source?
Are there spelling, grammar, or typographical errors?
Can you determine who the author/creator is? is there a way to contact them?