Section 1
Why the competitor here is semi-formal, not informal
Southern Europe's shadow economy is large by Western European standards, but it lives inside registered businesses rather than outside the system entirely. The pattern is under-declaration: cash jobs kept off the books, staff paid partly informally, revenue understated. Estimates put Italy's non-observed economy in the rough order of a tenth of GDP (ISTAT), and shadow-economy work has long placed Greece and Italy among the higher end in the eurozone (Schneider and successor estimates). Treat these as order-of-magnitude figures, not precise constants, because the shadow economy is by nature estimated rather than measured. The direction is clear enough: a meaningful slice of activity is under-reported by firms that are otherwise legitimate. That matters for you because it collapses the cleanest weapon from the Latin American version. There, the informal rival cannot issue a valid invoice at all, which walls off a whole formal-only segment. In Southern Europe your rival can issue an invoice. He just does not issue it for every job. The e-invoicing regimes are tightening this, Italy's fattura elettronica has been broadly mandatory since 2019, Greece's myDATA digitises the ledger, and enforcement is the variable that decides how big the under-declaration discount stays. But today your competitor is inside the system, partially. You cannot beat him by claiming he is outside it.
Section 2
The counter: enforcement-adjacent trust signals
Since you cannot draw a clean formal-versus-informal line, you compete on the gap between full declaration and partial declaration, and you make that gap visible with signals a fully-declaring firm can show and an under-declarer would rather not. • Full, itemised electronic invoicing as standard, never optional. In a market where "with or without a receipt" is a live question, being the firm that only works on the books, invoice issued every time through the official system, is itself a position. The under-declarer's edge depends on the cash option existing. Remove it from your offer and say so. • Traceable, insured, contracted delivery. Written contracts, insurance that pays, employees declared and covered. These are the things an under-declaring rival is structurally reluctant to match, because matching them fully erodes the margin his under-declaration was buying. • Signals aimed at buyers with exposure. A buyer who deducts the expense, claims input VAT, or could be audited has a direct interest in a fully-declared supplier, because an irregular invoice is their problem too. Aim your pitch at buyers who share the enforcement risk, and full declaration becomes a feature they need rather than a virtue they admire. The frame to the buyer is not "he is a criminal." It is closer to: "Everything we do is invoiced and declared, which means your paperwork is clean, your VAT is recoverable, and there is a real contract and real insurance behind the job." You are selling the absence of a mess the buyer would otherwise inherit.
Section 3
Where this leaves the price gap
Be honest about the limit. Because the rival is semi-formal, his discount is usually smaller than a fully-informal operator's, and his credibility is higher, so your trust signals do less work than they would against a cash-only vendor. This is a narrower wedge fought on a thinner margin of difference. The buyers who will pay for it are those with their own exposure to enforcement or their own need for clean documentation. For a private consumer who neither deducts the cost nor fears an audit, the under-declarer's slightly lower price still wins, and no signal changes that.
Section 4
The fitness test
You are ready to compete on enforcement-adjacent trust if your rival is a registered under-declarer rather than a true cash operator, if your buyers include anyone who deducts the expense or carries audit exposure, and if you genuinely declare everything and can prove it through the official e-invoicing system. Under those conditions, being the fully-on-the-books option is a position the semi-formal firm cannot occupy without giving up its margin. You are not ready to lean on this if your buyers are private individuals with no exposure and no need for clean paper, where the small under-declaration discount decides the sale. There the honest move is operational efficiency, or moving toward buyers who share your enforcement risk. The Latin American undercut and the Southern European one rhyme, but do not read from the same page. Here the rival is inside the system, and you beat him by being further inside it than he is willing to go.