If you are seeking assistance from a private cryptocurrency forensics firm, there are certain pieces of information that will be essential to gather and provide, the most important which are:
1. The blockchain transaction data associated with the incident. Without this data, a forensic investigation cannot be conducted. See Guide to gathering blockchain transaction data.
2. A background of what happened, in your own words -- 1-2 paragraphs is perfectly fine.
While there's nothing wrong with seeking assistance with a forensics expert, it is mindful to be cognizant about whether or not an engagement is worthwhile.
It is wise to do background research on any firm you are considering hiring, and it should be kept in mind that there many recovery scammers out there who simply seek to defraud victims of more money, as well grifters and unethical forensics firms who often don't have the best interests of victims at heart.
Do some research on firms -- what can you find out about them in the news and in public media outlets? If you can't find much about them, that is a red flag. What certifications do they have? What software do they use? Who are they allegedly partnered with and are those partnerships real? Are they active on social media? Are there at least some public-facing persons part of the firm? If not, again another bad sign.
Sidenote: 'reviews' and 'review' sites like Trustpilot can be easily manipulated and are not a good source of reviews.
