Why every service gives you a different deposit address
Your address on one platform does not work on another, and some services rotate yours. What is going on, and which address to trust.
There is no such thing as "your" single crypto address the way there is one bank account number. An address is just a destination someone controls, and each service you use generates its own.
Why they are all different
An address belongs to whoever holds its key. A deposit address a service shows you is one that service controls — it credits your balance when funds arrive there, but the key is theirs.
So an address from one platform is meaningless on another. Sending to it credits the first platform's records, not the second's.
Why one service's address can change
Some services generate a fresh address per deposit. That is a privacy measure: reusing one address makes your entire history linkable by anyone watching the chain.
Others assign one stable address per customer and keep it. Both are normal. What matters is using whichever address the service is showing you right now.
The practical rule
Take the address from the receive page of the account you want credited, immediately before sending. Not from a note, not from an old message, not from your transaction history.
BYCRYPTO assigns your account its own address per network and keeps it, so it does not change between deposits. Even so, take it from the Receive screen each time — that is the habit that protects you everywhere else, and it costs you five seconds.