Not depositing cash from business transactions Is it legal, in the U.S., to not deposit cash proceeding from business transactions, such as real estate rentals or restaurants, so long as those monies are ultimately declared as income to the IRS, although there is no paper trail verifying it from a third party (a bank)? In other words, are there laws that says cash proceeds, or a percentage thereof, must be deposited in a bank account to be used as official record for fiscal purposes?
No, it is not illegal There is no law that says a business must have a bank account, let alone that they must make deposits to it.
You have the legal (contractual) obligation to pay the amount that you owe for your meal. The restaurant can refuse to accept a particular kind of payment, such as check, cash, credit cards (generally or brand-specific), various cash-transfer programs, foreign currency, bitcoin or ridiculous numbers of pennies. There is no requirement that they do today what they did yesterday. If you have in your possession only a Discover card, and if they are unwilling to accept service barter as payment (washing dishes is classical), then you would have a debt to the restaurant which you must pay in a reasonable time, using an acceptable medium (such as cash, unless they don't accept cash). They cannot make it impossible or highly burdensome for you to discharge your obligation (e.g. they cannot demand Krugerrands or Mongolian ᠲᠥᠭᠦᠷᠢᠭ as the alternative payment, unless you are in Mongolia). You were given advance notice of this possibility of non-acceptance, yet you willfully proffered a card that you knew that they were not likely to accept a second time. Your hands were not clean, and if this had gone to court, you could not expect mercy from the court on the grounds that you were surprised that they didn't accept your card.
There is nothing wrong with paying in cash; there is something wrong about hiding a transaction that relates to a taxable event. Cash makes that easier.
Don't do it. So clearly tax fraud is bad and the state can prosecute this when tipped off. Alice is also clearly allowed to report the possible tax fraud to authorities and to serve as a witness if necessary. The problem is that Alice can expose herself to various liabilities, and could be sued by Bob or by the state. On what grounds did Alice snoop around in Bob's room? Even if they are roommates, Alice might not have a right to enter the room. Even if she has grounds to enter the room, she might not have permission to trawl through Bob's private stuff. A glance at a computer screen is also quite unlikely to show evidence of tax fraud, as even selling lots of stuff does not imply running a business.1 On what grounds can Alice collect and share personal data with authorities? There is no constitutional right for snooping and snitching.2 Alice must instead identify a legal basis for sharing such screenshots or pictures with third parties. Data protection law such as the GDPR does recognize that there might be a legitimate interest, but Alice is unlikely to have such a legitimate interest unless she is personally affected by Bob breaking the law. For example, some people have been sued for overly enthusiastic reports of parking violations. Footnotes: People can sell goods e.g. on eBay without running a business that would have to be registered with the tax office. A business in this context is any regular business-like for-profit activity. Thus, a registration might not be necessary for occasional activity, or if the activity isn't for profit. For example, a person selling their old stuff for less than they bought it for is not acting with a profit motive. Even if there is occasional profit, this can be a privates Veräußerungsgeschäft (private sale). Whether such a sale is taxable depends on the duration between acquisition and sale. If it is taxable, it has to be reported as part of income tax filings. Generally, the profit is free from income tax after one year. VAT is a different matter. Private sales don't involve VAT. When a sole proprietor registers a business, they can elect to ignore VAT until they reach certain turnover or profit limits (Kleinunternehmerregelung). This kind of tax fraud is typically not a crime, and more of an administrative offence. Thus, intrusive investigations are not proportional – and even then, they would be up to the state, not to individuals. It is worth noting that Germany has extremely poor whistleblower protections and has failed to implement relevant EU laws.
@Rick aptly answers your first question (and I totally agree with his answer including his conclusion that the cited provisions apply to single member LLCs). So, I'll touch on issues associated with your second one. Would there be anything legally wrong with my intentionally wasting the company's money or doing something similarly pointless and harmful to the business, considering I'm the only actual person (as in human, not legal person) who is harmed in any way? If the way you use the money wastefully is considered by a court to be a de facto distribution by the LLC to you, its sole member, and this renders it insolvent (as defined in ORS 63.229 (Limitations on distributions), you could have personal liability for the distribution to the company. See ORS 53.235. Creditors of the company could then garnish that obligation to collect their debts owed to the company from you (a garnishment is technically a right to obtain money or property from someone who owes a debt to a judgment debtor, usually a bank or employer, but not always as in this case). Intentionally wasting the company's money would probably constitute a &quot;fraudulent transfer&quot; on the part of the LLC which could expose you to liability to third-party creditors if those actions left the company unable to pay its debts as they came due, or with assets with a fair market value that was lower than the fair market value of its current and currently anticipated liabilities. This parallel liability would arise under the Oregon Fraudulent Transfers Act and related provisions of Oregon law found at ORS 95.200 to 95.310. If you were anticipating or in the process of divorcing, it could constitute economic waste that could be held against you (treating the wasted assets as if they still existed and were allocated to your in a property division). Likewise, if the waste reduced your income for child support purposes, a court would seriously consider imputing the income you could have had if you had not acting in that matter to the income you actually had, in order to calculate your child support obligation. And, you might be disallowed a deduction for the waste of the company's money, rather than having it treated as an expense, which could increase your income tax and self-employment tax liability. But, to the extent that you are the sole owner of the company, no creditor, spouse or child has rights impaired by your actions, and you don't claim the wasted assets as income tax deductions, there would be no one with standing to complain about your conduct in court.
When the buyer hears &quot;to avoid sales tax&quot; and hears the seller describing as a gift something that s/he knows was nothing of the sort, a reasonable buyer would know that this was at best suspicious, and would find out if this was legal. But assuming that the buyer accepted the seller's suggestion ignorantly and in good faith, the buyer can file a report of the transaction and pay any tax that should have been paid. The exact way of doing this will vary based on the laws of the buyer's jurisdiction (state-level if in the US) which is not given in the question. Such a report and payment might not prevent the local tax authorities from assessing an additional penalty. Criminal charges seem unlikely, but would be possible. If the seller was a used car dealer, the authorities might want the buyer to testify against the seller. They buyer might be wise to consult a lawyer with expertise in sales tax issues in the buyer's jurisdiction. Such a lawyer could advise on exactly what the buyer's legal obligation was, and how to avoid or minimize penalties or other consequences.
"...the listing ad of property is not a property of website." Why do you think that? Just because a website exists does not mean you can legally scrape it. Read the Terms of Service of the site; there is a good chance the TOS forbids scraping or copying of any part of the website in any manner, including scraping. If the property listings are from a third party service that provides real estate listings to websites, then those property listings are licensed to that website, and by scraping them you will likely be violating the TOSs of those two services. By illegally scraping the content of a website, you are opening yourself up to being involved in copyright infringement and/or being liable to be the subject of a civil lawsuit.
Since you asked, and it's a perfectly legitimate question, here's why it doesn't violate the Fifth Amendment (from Garner v. US): The Fifth Amendment doesn't say "you can't be made to say anything that hurts you." It says "no person...shall be compelled in any criminal case to be a witness against himself." The only time Fifth Amendment protection applies is if you are being forced by the government to make a statement that could open you up to an accusation or conviction of a criminal offense. It's fairly broad (if it would help prove any aspect of the charge, you can claim immunity), but it's also restricted (you can't claim it unless it really would tend to incriminate you). That means that you could only argue the Fifth Amendment if your tax return might help prove a criminal case against you (the fact that disclosing income leads to you needing to pay tax does not qualify as "self-incrimination"). But the amount of income is not one of those things that might incriminate you -- you can get income through all sorts of ways. The thing that is incriminating is revealing the source of the income, and you can claim Fifth Amendment privilege for that. So: The only time you could possibly claim privilege is if you were being forced into a statement that might tend to incriminate you in a criminal proceeding. A statement that makes you liable for tax doesn't mean it might incriminate you. Filing an income tax return isn't inherently incriminating. The fact that you have income not included in any other part of the return (illegal income goes under "other income") doesn't imply you've committed a crime -- lots of people have other income. The amount of income can't be incriminating. The source can be, but you can claim Fifth Amendment privilege for that if it might incriminate you. And lawful income under "other income" still might give rise to a reasonable fear of prosecution, so the fact that you're justified in claiming Fifth Amendment privilege in source of income doesn't mean you're guilty of a crime. Note that there are cases where you are flat-out exempt from filing tax returns under the Fifth Amendment: Marchetti v. US and Grosso v. US found that registration and tax on gambling could be blocked by a Fifth Amendment claim, which didn't even have to be asserted at time of filing, because merely filing the special return would establish you as a gambler (heavily regulated/often criminalized at the state level). The difference with the normal income tax form is that everyone (just about) files one, and so filing it doesn't mean you're a criminal. If there was a separate line along the lines of "Income from Illegal Drug Sales," that might be one thing (anything other than $0 is inherently incriminating). But all the questions are broad, and have many legal sources of income associated with them.