Business Certificate at a glance
What it is: Form X 201, Certificate of Conducting Business under an Assumed Name for Individual, is the Business Certificate in which you certify that you are conducting or transacting business under a name or designation.
Who signs: Sign the certificate after "IN WITNESS WHEREOF, I have signed this certificate on 20".
A filled-in Business Certificate example: a sole owner certifies a business name

How to fill out Business Certificate, box by box
The business name, city and county
Your name and where you reside
Successor in interest
Type of business

Fill in the Type of business. Some counties request the type of business.
Consultant Services, Medical-Home Care Services, Educational Services, Professional-Technical Services, Entertainment-Recreation, Real Estate Services, Finance-Insurance Services, Retail Trade, Home Improvement Services, Wholesale Trade and Other (state type) are listed.
Acknowledgment and Notary Stamp

In STATE OF NEW YORK, COUNTY OF ss.: the individual is personally known to me or proved to me on the basis of satisfactory evidence to be the individual(s) whose name(s) is (are) subscribed to the within instrument and acknowledged to me that he/she/they executed the same in his/her/their capacity(ies), and that by his/her/their signature(s) on the instrument, the individual(s), or the person upon behalf of which the individual(s) acted, executed the instrument. The signature and office of person taking acknowledgment and the Notary Stamp go with it.
More rules for Business Certificate
Under GBL §130.4, a certified copy of the original certificate, or of the most recent amended certificate filed, shall be conspicuously displayed on the premises at each place in which the business for which the same was filed is conducted.
Sources
[1] Business Certificate, X 201 Certificate of Conducting Business under an Assumed Name for Individual (the Official source link on this page).



