The most important thing about having a company anywhere is to ensure that you or someone who knows what to do will receive any correspondence sent to its registered address.
Thousands of companies are struck off the register in the UK every year because warning notices have gone unheeded. If that happens the company's property passes to the Crown and to get it back you've got to do a lot of legal work and spend a lot of money.
Similar things can happen in Bulgaria except not just with companies, but with buying private persons as well. It is vital to ensure that you have a reliable representative to handle these things so long as you are not living in BG. If you buy an apartment or a house in Bulgaria (or if your company buys land there) you are required to register in the Bulstat register where you declare a correspondence address in Bulgaria to which the state and sometimes private persons will send official documents. There could be extreme (but still possible!) instances when because of sums as ridiculously insignificant as 200 Euro one might lose his property just because his lawyer has been pressured by the agent to ease the procedure by declaring a correspondence address that isn’t current. Usually the address of the property that has been bought is declared and usually the owner doesn’t live there. Thus this address is not current as there’s nobody to receive summons, notifications and the like.