Can I (IP) provide physical services? services to a person without a contract?

Question

Freelance

I am engaged in maintenance of sites, sites have accumulated in order, I work with physical. persons. Can I continue to work without a contract with clients, and accept payments through payment aggregators?
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As far as I know IP and physical. a person can conclude an oral agreement (if the amount of the contract is less than 10 minimum wages), and upon completion of the service, the individual entrepreneur must give a check. As far as I know, it is possible to give On-line checks.

Answer 1

Your decision is an offer contract. This is how all online stores, cash registers and other web services work. It looks like this: on the site at a fixed URL there is an offer agreement, which stipulates all the conditions for cooperation between you and the client. The client must read this agreement and agree to it by pressing a button or checkmark (mandatory condition). This is a pure formality, but as the bank explained to me, it should be.
This option is possible: you send the client an invoice for payment and write in a note that "this invoice was sent in accordance with the offer agreement to the URL address .... Payment of the invoice is an acceptance of the agreement."
Generally speaking, it is illegal to work without a contract.

Answer 2

An offer is also a contract.

Answer 3

Actually, most of the small shops - IP. Well, many are now not on UTII, but on the simplified tax system. And they get by with a check. At least I have never had to conclude an agreement with them for the purchase of sausages ...

Answer 4

How are customers going to pay for IP?
If in cash (including a transfer to a bank card number), you need a cash register.