Yes you can. And you should. I do it all the time. I'm pre internet. The only way to get fins was to call. In fact, I've been lied to twice in phone calls to Saleen. Both times I knew she was lying. I was told two years ago they were building cars when they were not. I also called Red McCombs dealership in Texas and another one in Maryland.
Companies with complete financials and current filings will direct you to their website and most don't have a dedicated investment relations person anymore but OTC stocks are different.
With OTC stocks if you are not making calls and checking addresses, you're not doing proper DD. I need to see the product or service in action.
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