It is safer to give out your EIN than it is to give out your personal social security number. However, in my experiences, you'll very rarely need to use your EIN number for something. It's more common to provide the number in the retail world, when wholesalers require a business license in order to provide certain pricing.
Definitely do not print your EIN on invoices or other common documents. It's best to only provide it to trusted businesses when they specifically ask for it.
Similar in purpose to the Social Security Number assigned to individuals, EINs are used by employers and
The IRS uses this number to identify taxpayers that are required to file various business tax returns.
Contrary to some misconceptions, credit bureaus and credit issuers can tell the difference between
SSN and EIN Numbers. SSN Numbers can be validated as to origin and state / year of issuance.
The credit bureaus and issuers are highly trained in fraud detection, and increasingly sophisticated algorithms
and protections are used. This is why the EIN is not considered sensitive information, and is freely distributed
by many businesses by way of publications and the internet.
You may need it to ship boxes valued over $2500 out of the country, maybe $2000 can't remember exactly.