Do you currently shred and throw out, or just throw out, documents and envelopes with identifying information on them?
Don’t! Add them to the bin for composting (your own bin of course not a provided service bin)
After a day of two in the kitchen bin waiting to go out onto the garden compost heap most items, either torn up small or shredded, will be impossible to put back together again even if someone did riffle through your compost heap!!
All items with no identifiers can safely go into the recycling but all letters or envelopes that have any identification – and don’t forget about the envelopes – can be recycled into the compost heap and eventually turned into flowers or vegetables.